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Finding the Fourth Proportional to 98,107.20, 147,120.48 and 38,934.72

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Solution

The fourth proportional to 98,107.20, 147,120.48 and 38,934.72 is: 58,386.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,107.20 : 147,120.48 = 38,934.72 : x
  2. Step 2: Convert to fraction form
    98,107.20/147,120.48 = 38,934.72/x
  3. Step 3: Cross multiply
    98,107.20x = 147,120.48 × 38,934.72
  4. Step 4: Simplify right side
    98,107.20x = 5,728,094,695.07
  5. Step 5: Solve for x
    x = 5,728,094,695.07/98,107.20
  6. Step 6: Final answer
    x = 58,386.08

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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.