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Finding the Fourth Proportional to 78,597.26, 118,425.45 and 64,864.87

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Solution

The fourth proportional to 78,597.26, 118,425.45 and 64,864.87 is: 97,734.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,597.26 : 118,425.45 = 64,864.87 : x
  2. Step 2: Convert to fraction form
    78,597.26/118,425.45 = 64,864.87/x
  3. Step 3: Cross multiply
    78,597.26x = 118,425.45 × 64,864.87
  4. Step 4: Simplify right side
    78,597.26x = 7,681,651,566.97
  5. Step 5: Solve for x
    x = 7,681,651,566.97/78,597.26
  6. Step 6: Final answer
    x = 97,734.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.