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Finding the Fourth Proportional to 98,553.68, 147,935.78 and 42,421.60

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Solution

The fourth proportional to 98,553.68, 147,935.78 and 42,421.60 is: 63,677.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,553.68 : 147,935.78 = 42,421.60 : x
  2. Step 2: Convert to fraction form
    98,553.68/147,935.78 = 42,421.60/x
  3. Step 3: Cross multiply
    98,553.68x = 147,935.78 × 42,421.60
  4. Step 4: Simplify right side
    98,553.68x = 6,275,672,484.85
  5. Step 5: Solve for x
    x = 6,275,672,484.85/98,553.68
  6. Step 6: Final answer
    x = 63,677.71

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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.