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Finding the Fourth Proportional to 98,423.40, 147,658.47 and 31,863.54

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Solution

The fourth proportional to 98,423.40, 147,658.47 and 31,863.54 is: 47,802.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,423.40 : 147,658.47 = 31,863.54 : x
  2. Step 2: Convert to fraction form
    98,423.40/147,658.47 = 31,863.54/x
  3. Step 3: Cross multiply
    98,423.40x = 147,658.47 × 31,863.54
  4. Step 4: Simplify right side
    98,423.40x = 4,704,921,565.18
  5. Step 5: Solve for x
    x = 4,704,921,565.18/98,423.40
  6. Step 6: Final answer
    x = 47,802.88

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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.