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Finding the Fourth Proportional to 210,747.76, 316,121.28 and 98,390.32

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Solution

The fourth proportional to 210,747.76, 316,121.28 and 98,390.32 is: 147,585.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,747.76 : 316,121.28 = 98,390.32 : x
  2. Step 2: Convert to fraction form
    210,747.76/316,121.28 = 98,390.32/x
  3. Step 3: Cross multiply
    210,747.76x = 316,121.28 × 98,390.32
  4. Step 4: Simplify right side
    210,747.76x = 31,103,273,898.01
  5. Step 5: Solve for x
    x = 31,103,273,898.01/210,747.76
  6. Step 6: Final answer
    x = 147,585.31

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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.