Home / 87,411.81-120,512.15-57,145.10

Finding the Fourth Proportional to 87,411.81, 120,512.15 and 57,145.10

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Solution

The fourth proportional to 87,411.81, 120,512.15 and 57,145.10 is: 78,784.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,411.81 : 120,512.15 = 57,145.10 : x
  2. Step 2: Convert to fraction form
    87,411.81/120,512.15 = 57,145.10/x
  3. Step 3: Cross multiply
    87,411.81x = 120,512.15 × 57,145.10
  4. Step 4: Simplify right side
    87,411.81x = 6,886,678,510.41
  5. Step 5: Solve for x
    x = 6,886,678,510.41/87,411.81
  6. Step 6: Final answer
    x = 78,784.30

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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.