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Finding the Fourth Proportional to 74,871.40, 112,307.10 and 68,747.80

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Solution

The fourth proportional to 74,871.40, 112,307.10 and 68,747.80 is: 103,121.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,871.40 : 112,307.10 = 68,747.80 : x
  2. Step 2: Convert to fraction form
    74,871.40/112,307.10 = 68,747.80/x
  3. Step 3: Cross multiply
    74,871.40x = 112,307.10 × 68,747.80
  4. Step 4: Simplify right side
    74,871.40x = 7,720,866,049.38
  5. Step 5: Solve for x
    x = 7,720,866,049.38/74,871.40
  6. Step 6: Final answer
    x = 103,121.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.