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Finding the Fourth Proportional to 78,442.88, 108,252 and 42,632.88

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Solution

The fourth proportional to 78,442.88, 108,252 and 42,632.88 is: 58,833.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,442.88 : 108,252 = 42,632.88 : x
  2. Step 2: Convert to fraction form
    78,442.88/108,252 = 42,632.88/x
  3. Step 3: Cross multiply
    78,442.88x = 108,252 × 42,632.88
  4. Step 4: Simplify right side
    78,442.88x = 4,615,094,525.76
  5. Step 5: Solve for x
    x = 4,615,094,525.76/78,442.88
  6. Step 6: Final answer
    x = 58,833.82

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1.5x scale

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.