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Finding the Fourth Proportional to 84,695.70, 126,962.55 and 31,373.40

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Solution

The fourth proportional to 84,695.70, 126,962.55 and 31,373.40 is: 47,030.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,695.70 : 126,962.55 = 31,373.40 : x
  2. Step 2: Convert to fraction form
    84,695.70/126,962.55 = 31,373.40/x
  3. Step 3: Cross multiply
    84,695.70x = 126,962.55 × 31,373.40
  4. Step 4: Simplify right side
    84,695.70x = 3,983,246,866.17
  5. Step 5: Solve for x
    x = 3,983,246,866.17/84,695.70
  6. Step 6: Final answer
    x = 47,030.10

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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.