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Finding the Fourth Proportional to 142,045.90, 195,846.09 and 90,974.71

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Solution

The fourth proportional to 142,045.90, 195,846.09 and 90,974.71 is: 125,431.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,045.90 : 195,846.09 = 90,974.71 : x
  2. Step 2: Convert to fraction form
    142,045.90/195,846.09 = 90,974.71/x
  3. Step 3: Cross multiply
    142,045.90x = 195,846.09 × 90,974.71
  4. Step 4: Simplify right side
    142,045.90x = 17,817,041,242.38
  5. Step 5: Solve for x
    x = 17,817,041,242.38/142,045.90
  6. Step 6: Final answer
    x = 125,431.58

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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.