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Finding the Fourth Proportional to 74,679.60, 112,019.40 and 39,601.20

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Solution

The fourth proportional to 74,679.60, 112,019.40 and 39,601.20 is: 59,401.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,679.60 : 112,019.40 = 39,601.20 : x
  2. Step 2: Convert to fraction form
    74,679.60/112,019.40 = 39,601.20/x
  3. Step 3: Cross multiply
    74,679.60x = 112,019.40 × 39,601.20
  4. Step 4: Simplify right side
    74,679.60x = 4,436,102,663.28
  5. Step 5: Solve for x
    x = 4,436,102,663.28/74,679.60
  6. Step 6: Final answer
    x = 59,401.80

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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.