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Finding the Fourth Proportional to 86,332.42, 118,900.47 and 74,391.40

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Solution

The fourth proportional to 86,332.42, 118,900.47 and 74,391.40 is: 102,454.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,332.42 : 118,900.47 = 74,391.40 : x
  2. Step 2: Convert to fraction form
    86,332.42/118,900.47 = 74,391.40/x
  3. Step 3: Cross multiply
    86,332.42x = 118,900.47 × 74,391.40
  4. Step 4: Simplify right side
    86,332.42x = 8,845,172,423.96
  5. Step 5: Solve for x
    x = 8,845,172,423.96/86,332.42
  6. Step 6: Final answer
    x = 102,454.82

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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.