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Finding the Fourth Proportional to 90,008.71, 124,213.06 and 49,721.63

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Solution

The fourth proportional to 90,008.71, 124,213.06 and 49,721.63 is: 68,616.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,008.71 : 124,213.06 = 49,721.63 : x
  2. Step 2: Convert to fraction form
    90,008.71/124,213.06 = 49,721.63/x
  3. Step 3: Cross multiply
    90,008.71x = 124,213.06 × 49,721.63
  4. Step 4: Simplify right side
    90,008.71x = 6,176,075,375.65
  5. Step 5: Solve for x
    x = 6,176,075,375.65/90,008.71
  6. Step 6: Final answer
    x = 68,616.42

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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.