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Finding the Fourth Proportional to 155,818, 215,024.28 and 87,838.96

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Solution

The fourth proportional to 155,818, 215,024.28 and 87,838.96 is: 121,215.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,818 : 215,024.28 = 87,838.96 : x
  2. Step 2: Convert to fraction form
    155,818/215,024.28 = 87,838.96/x
  3. Step 3: Cross multiply
    155,818x = 215,024.28 × 87,838.96
  4. Step 4: Simplify right side
    155,818x = 18,887,509,129.95
  5. Step 5: Solve for x
    x = 18,887,509,129.95/155,818
  6. Step 6: Final answer
    x = 121,215.19

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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.