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Finding the Fourth Proportional to 98,472.80, 147,536.40 and 80,847.20

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Solution

The fourth proportional to 98,472.80, 147,536.40 and 80,847.20 is: 121,128.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,472.80 : 147,536.40 = 80,847.20 : x
  2. Step 2: Convert to fraction form
    98,472.80/147,536.40 = 80,847.20/x
  3. Step 3: Cross multiply
    98,472.80x = 147,536.40 × 80,847.20
  4. Step 4: Simplify right side
    98,472.80x = 11,927,904,838.08
  5. Step 5: Solve for x
    x = 11,927,904,838.08/98,472.80
  6. Step 6: Final answer
    x = 121,128.93

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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.