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Finding the Fourth Proportional to 115,330.70, 158,920.17 and 85,068.11

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Solution

The fourth proportional to 115,330.70, 158,920.17 and 85,068.11 is: 117,219.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,330.70 : 158,920.17 = 85,068.11 : x
  2. Step 2: Convert to fraction form
    115,330.70/158,920.17 = 85,068.11/x
  3. Step 3: Cross multiply
    115,330.70x = 158,920.17 × 85,068.11
  4. Step 4: Simplify right side
    115,330.70x = 13,519,038,502.78
  5. Step 5: Solve for x
    x = 13,519,038,502.78/115,330.70
  6. Step 6: Final answer
    x = 117,219.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.