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Finding the Fourth Proportional to 280,112.80, 420,169.20 and 93,124.30

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Solution

The fourth proportional to 280,112.80, 420,169.20 and 93,124.30 is: 139,686.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,112.80 : 420,169.20 = 93,124.30 : x
  2. Step 2: Convert to fraction form
    280,112.80/420,169.20 = 93,124.30/x
  3. Step 3: Cross multiply
    280,112.80x = 420,169.20 × 93,124.30
  4. Step 4: Simplify right side
    280,112.80x = 39,127,962,631.56
  5. Step 5: Solve for x
    x = 39,127,962,631.56/280,112.80
  6. Step 6: Final answer
    x = 139,686.45

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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.