Home / 91,154.08-125,753.80-57,139.32

Finding the Fourth Proportional to 91,154.08, 125,753.80 and 57,139.32

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Solution

The fourth proportional to 91,154.08, 125,753.80 and 57,139.32 is: 78,827.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,154.08 : 125,753.80 = 57,139.32 : x
  2. Step 2: Convert to fraction form
    91,154.08/125,753.80 = 57,139.32/x
  3. Step 3: Cross multiply
    91,154.08x = 125,753.80 × 57,139.32
  4. Step 4: Simplify right side
    91,154.08x = 7,185,486,619.42
  5. Step 5: Solve for x
    x = 7,185,486,619.42/91,154.08
  6. Step 6: Final answer
    x = 78,827.92

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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.