Home / 78,132.68-107,823.05-42,322.61

Finding the Fourth Proportional to 78,132.68, 107,823.05 and 42,322.61

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Solution

The fourth proportional to 78,132.68, 107,823.05 and 42,322.61 is: 58,405.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,132.68 : 107,823.05 = 42,322.61 : x
  2. Step 2: Convert to fraction form
    78,132.68/107,823.05 = 42,322.61/x
  3. Step 3: Cross multiply
    78,132.68x = 107,823.05 × 42,322.61
  4. Step 4: Simplify right side
    78,132.68x = 4,563,352,894.16
  5. Step 5: Solve for x
    x = 4,563,352,894.16/78,132.68
  6. Step 6: Final answer
    x = 58,405.18

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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.