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Finding the Fourth Proportional to 74,972.80, 112,441.20 and 43,314.40

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Solution

The fourth proportional to 74,972.80, 112,441.20 and 43,314.40 is: 64,961.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,972.80 : 112,441.20 = 43,314.40 : x
  2. Step 2: Convert to fraction form
    74,972.80/112,441.20 = 43,314.40/x
  3. Step 3: Cross multiply
    74,972.80x = 112,441.20 × 43,314.40
  4. Step 4: Simplify right side
    74,972.80x = 4,870,323,113.28
  5. Step 5: Solve for x
    x = 4,870,323,113.28/74,972.80
  6. Step 6: Final answer
    x = 64,961.20

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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.