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Finding the Fourth Proportional to 78,663.84, 108,552.36 and 42,853.68

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Solution

The fourth proportional to 78,663.84, 108,552.36 and 42,853.68 is: 59,136.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,663.84 : 108,552.36 = 42,853.68 : x
  2. Step 2: Convert to fraction form
    78,663.84/108,552.36 = 42,853.68/x
  3. Step 3: Cross multiply
    78,663.84x = 108,552.36 × 42,853.68
  4. Step 4: Simplify right side
    78,663.84x = 4,651,868,098.68
  5. Step 5: Solve for x
    x = 4,651,868,098.68/78,663.84
  6. Step 6: Final answer
    x = 59,136.04

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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.