Home / 102,358.40-141,265-57,043.76

Finding the Fourth Proportional to 102,358.40, 141,265 and 57,043.76

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Solution

The fourth proportional to 102,358.40, 141,265 and 57,043.76 is: 78,726.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,358.40 : 141,265 = 57,043.76 : x
  2. Step 2: Convert to fraction form
    102,358.40/141,265 = 57,043.76/x
  3. Step 3: Cross multiply
    102,358.40x = 141,265 × 57,043.76
  4. Step 4: Simplify right side
    102,358.40x = 8,058,286,756.40
  5. Step 5: Solve for x
    x = 8,058,286,756.40/102,358.40
  6. Step 6: Final answer
    x = 78,726.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.