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Finding the Fourth Proportional to 108,535.40, 162,486.30 and 77,431.40

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Solution

The fourth proportional to 108,535.40, 162,486.30 and 77,431.40 is: 115,921.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,535.40 : 162,486.30 = 77,431.40 : x
  2. Step 2: Convert to fraction form
    108,535.40/162,486.30 = 77,431.40/x
  3. Step 3: Cross multiply
    108,535.40x = 162,486.30 × 77,431.40
  4. Step 4: Simplify right side
    108,535.40x = 12,581,541,689.82
  5. Step 5: Solve for x
    x = 12,581,541,689.82/108,535.40
  6. Step 6: Final answer
    x = 115,921.09

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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.