Home / 102,389.74-141,280.71-57,057.78

Finding the Fourth Proportional to 102,389.74, 141,280.71 and 57,057.78

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Solution

The fourth proportional to 102,389.74, 141,280.71 and 57,057.78 is: 78,730.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,389.74 : 141,280.71 = 57,057.78 : x
  2. Step 2: Convert to fraction form
    102,389.74/141,280.71 = 57,057.78/x
  3. Step 3: Cross multiply
    102,389.74x = 141,280.71 × 57,057.78
  4. Step 4: Simplify right side
    102,389.74x = 8,061,163,985.26
  5. Step 5: Solve for x
    x = 8,061,163,985.26/102,389.74
  6. Step 6: Final answer
    x = 78,730.19

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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.