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Finding the Fourth Proportional to 90,880.80, 136,314.72 and 28,569.12

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Solution

The fourth proportional to 90,880.80, 136,314.72 and 28,569.12 is: 42,851.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,880.80 : 136,314.72 = 28,569.12 : x
  2. Step 2: Convert to fraction form
    90,880.80/136,314.72 = 28,569.12/x
  3. Step 3: Cross multiply
    90,880.80x = 136,314.72 × 28,569.12
  4. Step 4: Simplify right side
    90,880.80x = 3,894,391,593.45
  5. Step 5: Solve for x
    x = 3,894,391,593.45/90,880.80
  6. Step 6: Final answer
    x = 42,851.64

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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.