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Finding the Fourth Proportional to 230,757.90, 318,461.88 and 128,803.20

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Solution

The fourth proportional to 230,757.90, 318,461.88 and 128,803.20 is: 177,757.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,757.90 : 318,461.88 = 128,803.20 : x
  2. Step 2: Convert to fraction form
    230,757.90/318,461.88 = 128,803.20/x
  3. Step 3: Cross multiply
    230,757.90x = 318,461.88 × 128,803.20
  4. Step 4: Simplify right side
    230,757.90x = 41,018,909,222.02
  5. Step 5: Solve for x
    x = 41,018,909,222.02/230,757.90
  6. Step 6: Final answer
    x = 177,757.33

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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.