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Finding the Fourth Proportional to 291,957.12, 438,134.40 and 104,987.52

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Solution

The fourth proportional to 291,957.12, 438,134.40 and 104,987.52 is: 157,552.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,957.12 : 438,134.40 = 104,987.52 : x
  2. Step 2: Convert to fraction form
    291,957.12/438,134.40 = 104,987.52/x
  3. Step 3: Cross multiply
    291,957.12x = 438,134.40 × 104,987.52
  4. Step 4: Simplify right side
    291,957.12x = 45,998,644,082.69
  5. Step 5: Solve for x
    x = 45,998,644,082.69/291,957.12
  6. Step 6: Final answer
    x = 157,552.74

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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.