Home / 78,132.67-107,823.36-42,322.57

Finding the Fourth Proportional to 78,132.67, 107,823.36 and 42,322.57

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Solution

The fourth proportional to 78,132.67, 107,823.36 and 42,322.57 is: 58,405.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,132.67 : 107,823.36 = 42,322.57 : x
  2. Step 2: Convert to fraction form
    78,132.67/107,823.36 = 42,322.57/x
  3. Step 3: Cross multiply
    78,132.67x = 107,823.36 × 42,322.57
  4. Step 4: Simplify right side
    78,132.67x = 4,563,361,701.24
  5. Step 5: Solve for x
    x = 4,563,361,701.24/78,132.67
  6. Step 6: Final answer
    x = 58,405.30

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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.