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Finding the Fourth Proportional to 74,900.40, 112,480.20 and 39,908.40

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Solution

The fourth proportional to 74,900.40, 112,480.20 and 39,908.40 is: 59,931.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,900.40 : 112,480.20 = 39,908.40 : x
  2. Step 2: Convert to fraction form
    74,900.40/112,480.20 = 39,908.40/x
  3. Step 3: Cross multiply
    74,900.40x = 112,480.20 × 39,908.40
  4. Step 4: Simplify right side
    74,900.40x = 4,488,904,813.68
  5. Step 5: Solve for x
    x = 4,488,904,813.68/74,900.40
  6. Step 6: Final answer
    x = 59,931.65

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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.