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Finding the Fourth Proportional to 98,472.34, 147,708.52 and 78,658.12

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Solution

The fourth proportional to 98,472.34, 147,708.52 and 78,658.12 is: 117,987.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,472.34 : 147,708.52 = 78,658.12 : x
  2. Step 2: Convert to fraction form
    98,472.34/147,708.52 = 78,658.12/x
  3. Step 3: Cross multiply
    98,472.34x = 147,708.52 × 78,658.12
  4. Step 4: Simplify right side
    98,472.34x = 11,618,474,479.17
  5. Step 5: Solve for x
    x = 11,618,474,479.17/98,472.34
  6. Step 6: Final answer
    x = 117,987.19

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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.