Home / 81,768.28-112,830.12-47,318.92

Finding the Fourth Proportional to 81,768.28, 112,830.12 and 47,318.92

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Solution

The fourth proportional to 81,768.28, 112,830.12 and 47,318.92 is: 65,294.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,768.28 : 112,830.12 = 47,318.92 : x
  2. Step 2: Convert to fraction form
    81,768.28/112,830.12 = 47,318.92/x
  3. Step 3: Cross multiply
    81,768.28x = 112,830.12 × 47,318.92
  4. Step 4: Simplify right side
    81,768.28x = 5,338,999,421.87
  5. Step 5: Solve for x
    x = 5,338,999,421.87/81,768.28
  6. Step 6: Final answer
    x = 65,294.26

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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.