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Finding the Fourth Proportional to 230,528.61, 318,130.88 and 128,560.52

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Solution

The fourth proportional to 230,528.61, 318,130.88 and 128,560.52 is: 177,414.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,528.61 : 318,130.88 = 128,560.52 : x
  2. Step 2: Convert to fraction form
    230,528.61/318,130.88 = 128,560.52/x
  3. Step 3: Cross multiply
    230,528.61x = 318,130.88 × 128,560.52
  4. Step 4: Simplify right side
    230,528.61x = 40,899,070,916.89
  5. Step 5: Solve for x
    x = 40,899,070,916.89/230,528.61
  6. Step 6: Final answer
    x = 177,414.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.