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Finding the Fourth Proportional to 78,987.58, 118,487.48 and 26,397.24

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Solution

The fourth proportional to 78,987.58, 118,487.48 and 26,397.24 is: 39,597.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,987.58 : 118,487.48 = 26,397.24 : x
  2. Step 2: Convert to fraction form
    78,987.58/118,487.48 = 26,397.24/x
  3. Step 3: Cross multiply
    78,987.58x = 118,487.48 × 26,397.24
  4. Step 4: Simplify right side
    78,987.58x = 3,127,742,446.56
  5. Step 5: Solve for x
    x = 3,127,742,446.56/78,987.58
  6. Step 6: Final answer
    x = 39,597.90

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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.