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Finding the Fourth Proportional to 98,898.40, 136,443 and 63,080.20

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Solution

The fourth proportional to 98,898.40, 136,443 and 63,080.20 is: 87,027.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,898.40 : 136,443 = 63,080.20 : x
  2. Step 2: Convert to fraction form
    98,898.40/136,443 = 63,080.20/x
  3. Step 3: Cross multiply
    98,898.40x = 136,443 × 63,080.20
  4. Step 4: Simplify right side
    98,898.40x = 8,606,851,728.60
  5. Step 5: Solve for x
    x = 8,606,851,728.60/98,898.40
  6. Step 6: Final answer
    x = 87,027.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.