Home / 102,688.83-141,705.49-57,357.78

Finding the Fourth Proportional to 102,688.83, 141,705.49 and 57,357.78

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Solution

The fourth proportional to 102,688.83, 141,705.49 and 57,357.78 is: 79,150.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,688.83 : 141,705.49 = 57,357.78 : x
  2. Step 2: Convert to fraction form
    102,688.83/141,705.49 = 57,357.78/x
  3. Step 3: Cross multiply
    102,688.83x = 141,705.49 × 57,357.78
  4. Step 4: Simplify right side
    102,688.83x = 8,127,912,320.21
  5. Step 5: Solve for x
    x = 8,127,912,320.21/102,688.83
  6. Step 6: Final answer
    x = 79,150.89

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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.