Home / 77,139.22-106,421.70-48,442

Finding the Fourth Proportional to 77,139.22, 106,421.70 and 48,442

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Solution

The fourth proportional to 77,139.22, 106,421.70 and 48,442 is: 66,830.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,139.22 : 106,421.70 = 48,442 : x
  2. Step 2: Convert to fraction form
    77,139.22/106,421.70 = 48,442/x
  3. Step 3: Cross multiply
    77,139.22x = 106,421.70 × 48,442
  4. Step 4: Simplify right side
    77,139.22x = 5,155,279,991.40
  5. Step 5: Solve for x
    x = 5,155,279,991.40/77,139.22
  6. Step 6: Final answer
    x = 66,830.85

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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.