Home / 280,123,331.20-420,247,982.40-86,043,702.40

Finding the Fourth Proportional to 280,123,331.20, 420,247,982.40 and 86,043,702.40

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Solution

The fourth proportional to 280,123,331.20, 420,247,982.40 and 86,043,702.40 is: 129,084,900.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,123,331.20 : 420,247,982.40 = 86,043,702.40 : x
  2. Step 2: Convert to fraction form
    280,123,331.20/420,247,982.40 = 86,043,702.40/x
  3. Step 3: Cross multiply
    280,123,331.20x = 420,247,982.40 × 86,043,702.40
  4. Step 4: Simplify right side
    280,123,331.20x = 36,159,692,331,826,040
  5. Step 5: Solve for x
    x = 36,159,692,331,826,040/280,123,331.20
  6. Step 6: Final answer
    x = 129,084,900.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.