Home / 83,851.12-115,704.02-56,686.30

Finding the Fourth Proportional to 83,851.12, 115,704.02 and 56,686.30

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Solution

The fourth proportional to 83,851.12, 115,704.02 and 56,686.30 is: 78,219.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,851.12 : 115,704.02 = 56,686.30 : x
  2. Step 2: Convert to fraction form
    83,851.12/115,704.02 = 56,686.30/x
  3. Step 3: Cross multiply
    83,851.12x = 115,704.02 × 56,686.30
  4. Step 4: Simplify right side
    83,851.12x = 6,558,832,788.93
  5. Step 5: Solve for x
    x = 6,558,832,788.93/83,851.12
  6. Step 6: Final answer
    x = 78,219.98

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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.