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Finding the Fourth Proportional to 154,428.10, 231,642.15 and 65,659.30

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Solution

The fourth proportional to 154,428.10, 231,642.15 and 65,659.30 is: 98,488.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,428.10 : 231,642.15 = 65,659.30 : x
  2. Step 2: Convert to fraction form
    154,428.10/231,642.15 = 65,659.30/x
  3. Step 3: Cross multiply
    154,428.10x = 231,642.15 × 65,659.30
  4. Step 4: Simplify right side
    154,428.10x = 15,209,461,419.50
  5. Step 5: Solve for x
    x = 15,209,461,419.50/154,428.10
  6. Step 6: Final answer
    x = 98,488.95

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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.