Home / 156,129.04-215,491.80-98,731.72

Finding the Fourth Proportional to 156,129.04, 215,491.80 and 98,731.72

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Solution

The fourth proportional to 156,129.04, 215,491.80 and 98,731.72 is: 136,271.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,129.04 : 215,491.80 = 98,731.72 : x
  2. Step 2: Convert to fraction form
    156,129.04/215,491.80 = 98,731.72/x
  3. Step 3: Cross multiply
    156,129.04x = 215,491.80 × 98,731.72
  4. Step 4: Simplify right side
    156,129.04x = 21,275,876,059.90
  5. Step 5: Solve for x
    x = 21,275,876,059.90/156,129.04
  6. Step 6: Final answer
    x = 136,271.10

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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.