Home / 87,010.16-120,038.60-56,785

Finding the Fourth Proportional to 87,010.16, 120,038.60 and 56,785

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Solution

The fourth proportional to 87,010.16, 120,038.60 and 56,785 is: 78,340.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,010.16 : 120,038.60 = 56,785 : x
  2. Step 2: Convert to fraction form
    87,010.16/120,038.60 = 56,785/x
  3. Step 3: Cross multiply
    87,010.16x = 120,038.60 × 56,785
  4. Step 4: Simplify right side
    87,010.16x = 6,816,391,901
  5. Step 5: Solve for x
    x = 6,816,391,901/87,010.16
  6. Step 6: Final answer
    x = 78,340.18

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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.