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Finding the Fourth Proportional to 82,731.40, 124,097.10 and 74,955.40

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Solution

The fourth proportional to 82,731.40, 124,097.10 and 74,955.40 is: 112,433.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,731.40 : 124,097.10 = 74,955.40 : x
  2. Step 2: Convert to fraction form
    82,731.40/124,097.10 = 74,955.40/x
  3. Step 3: Cross multiply
    82,731.40x = 124,097.10 × 74,955.40
  4. Step 4: Simplify right side
    82,731.40x = 9,301,747,769.34
  5. Step 5: Solve for x
    x = 9,301,747,769.34/82,731.40
  6. Step 6: Final answer
    x = 112,433.10

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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.