Home / 77,932.80-107,547.10-42,122.72

Finding the Fourth Proportional to 77,932.80, 107,547.10 and 42,122.72

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Solution

The fourth proportional to 77,932.80, 107,547.10 and 42,122.72 is: 58,129.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,932.80 : 107,547.10 = 42,122.72 : x
  2. Step 2: Convert to fraction form
    77,932.80/107,547.10 = 42,122.72/x
  3. Step 3: Cross multiply
    77,932.80x = 107,547.10 × 42,122.72
  4. Step 4: Simplify right side
    77,932.80x = 4,530,176,543.67
  5. Step 5: Solve for x
    x = 4,530,176,543.67/77,932.80
  6. Step 6: Final answer
    x = 58,129.27

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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.