Home / 90,378.20-124,721.62-49,543.32

Finding the Fourth Proportional to 90,378.20, 124,721.62 and 49,543.32

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Solution

The fourth proportional to 90,378.20, 124,721.62 and 49,543.32 is: 68,369.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,378.20 : 124,721.62 = 49,543.32 : x
  2. Step 2: Convert to fraction form
    90,378.20/124,721.62 = 49,543.32/x
  3. Step 3: Cross multiply
    90,378.20x = 124,721.62 × 49,543.32
  4. Step 4: Simplify right side
    90,378.20x = 6,179,123,130.58
  5. Step 5: Solve for x
    x = 6,179,123,130.58/90,378.20
  6. Step 6: Final answer
    x = 68,369.62

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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.