Home / 156,511.19-215,953.94-99,172.91

Finding the Fourth Proportional to 156,511.19, 215,953.94 and 99,172.91

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Solution

The fourth proportional to 156,511.19, 215,953.94 and 99,172.91 is: 136,838.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,511.19 : 215,953.94 = 99,172.91 : x
  2. Step 2: Convert to fraction form
    156,511.19/215,953.94 = 99,172.91/x
  3. Step 3: Cross multiply
    156,511.19x = 215,953.94 × 99,172.91
  4. Step 4: Simplify right side
    156,511.19x = 21,416,779,080.13
  5. Step 5: Solve for x
    x = 21,416,779,080.13/156,511.19
  6. Step 6: Final answer
    x = 136,838.65

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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.