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Finding the Fourth Proportional to 85,663.38, 128,354.61 and 60,658.54

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Solution

The fourth proportional to 85,663.38, 128,354.61 and 60,658.54 is: 90,888.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,663.38 : 128,354.61 = 60,658.54 : x
  2. Step 2: Convert to fraction form
    85,663.38/128,354.61 = 60,658.54/x
  3. Step 3: Cross multiply
    85,663.38x = 128,354.61 × 60,658.54
  4. Step 4: Simplify right side
    85,663.38x = 7,785,802,678.92
  5. Step 5: Solve for x
    x = 7,785,802,678.92/85,663.38
  6. Step 6: Final answer
    x = 90,888.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.