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Finding the Fourth Proportional to 78,877.77, 117,712.97 and 70,463.28

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Solution

The fourth proportional to 78,877.77, 117,712.97 and 70,463.28 is: 105,155.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,877.77 : 117,712.97 = 70,463.28 : x
  2. Step 2: Convert to fraction form
    78,877.77/117,712.97 = 70,463.28/x
  3. Step 3: Cross multiply
    78,877.77x = 117,712.97 × 70,463.28
  4. Step 4: Simplify right side
    78,877.77x = 8,294,441,612.43
  5. Step 5: Solve for x
    x = 8,294,441,612.43/78,877.77
  6. Step 6: Final answer
    x = 105,155.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.