Home / 78,082.65-107,752.75-42,272.35

Finding the Fourth Proportional to 78,082.65, 107,752.75 and 42,272.35

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Solution

The fourth proportional to 78,082.65, 107,752.75 and 42,272.35 is: 58,335.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,082.65 : 107,752.75 = 42,272.35 : x
  2. Step 2: Convert to fraction form
    78,082.65/107,752.75 = 42,272.35/x
  3. Step 3: Cross multiply
    78,082.65x = 107,752.75 × 42,272.35
  4. Step 4: Simplify right side
    78,082.65x = 4,554,961,586.40
  5. Step 5: Solve for x
    x = 4,554,961,586.40/78,082.65
  6. Step 6: Final answer
    x = 58,335.13

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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.