Home / 78,140.12-107,763.90-61,343.96

Finding the Fourth Proportional to 78,140.12, 107,763.90 and 61,343.96

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Solution

The fourth proportional to 78,140.12, 107,763.90 and 61,343.96 is: 84,600.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,140.12 : 107,763.90 = 61,343.96 : x
  2. Step 2: Convert to fraction form
    78,140.12/107,763.90 = 61,343.96/x
  3. Step 3: Cross multiply
    78,140.12x = 107,763.90 × 61,343.96
  4. Step 4: Simplify right side
    78,140.12x = 6,610,664,371.04
  5. Step 5: Solve for x
    x = 6,610,664,371.04/78,140.12
  6. Step 6: Final answer
    x = 84,600.13

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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.