Home / 78,122.47-107,779.29-57,753.45

Finding the Fourth Proportional to 78,122.47, 107,779.29 and 57,753.45

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Solution

The fourth proportional to 78,122.47, 107,779.29 and 57,753.45 is: 79,677.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,122.47 : 107,779.29 = 57,753.45 : x
  2. Step 2: Convert to fraction form
    78,122.47/107,779.29 = 57,753.45/x
  3. Step 3: Cross multiply
    78,122.47x = 107,779.29 × 57,753.45
  4. Step 4: Simplify right side
    78,122.47x = 6,224,625,836.05
  5. Step 5: Solve for x
    x = 6,224,625,836.05/78,122.47
  6. Step 6: Final answer
    x = 79,677.79

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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.