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Finding the Fourth Proportional to 78,774.86, 117,903.42 and 59,953.28

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Solution

The fourth proportional to 78,774.86, 117,903.42 and 59,953.28 is: 89,732.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,774.86 : 117,903.42 = 59,953.28 : x
  2. Step 2: Convert to fraction form
    78,774.86/117,903.42 = 59,953.28/x
  3. Step 3: Cross multiply
    78,774.86x = 117,903.42 × 59,953.28
  4. Step 4: Simplify right side
    78,774.86x = 7,068,696,752.22
  5. Step 5: Solve for x
    x = 7,068,696,752.22/78,774.86
  6. Step 6: Final answer
    x = 89,732.90

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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.