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Finding the Fourth Proportional to 117,423.60, 176,058.90 and 77,321.28

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Solution

The fourth proportional to 117,423.60, 176,058.90 and 77,321.28 is: 115,931.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,423.60 : 176,058.90 = 77,321.28 : x
  2. Step 2: Convert to fraction form
    117,423.60/176,058.90 = 77,321.28/x
  3. Step 3: Cross multiply
    117,423.60x = 176,058.90 × 77,321.28
  4. Step 4: Simplify right side
    117,423.60x = 13,613,099,503.39
  5. Step 5: Solve for x
    x = 13,613,099,503.39/117,423.60
  6. Step 6: Final answer
    x = 115,931.55

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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.