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Finding the Fourth Proportional to 80,988.30, 111,715.74 and 63,054.90

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Solution

The fourth proportional to 80,988.30, 111,715.74 and 63,054.90 is: 86,978.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,988.30 : 111,715.74 = 63,054.90 : x
  2. Step 2: Convert to fraction form
    80,988.30/111,715.74 = 63,054.90/x
  3. Step 3: Cross multiply
    80,988.30x = 111,715.74 × 63,054.90
  4. Step 4: Simplify right side
    80,988.30x = 7,044,224,814.13
  5. Step 5: Solve for x
    x = 7,044,224,814.13/80,988.30
  6. Step 6: Final answer
    x = 86,978.30

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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.