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Finding the Fourth Proportional to 108,065.70, 162,280.80 and 90,278.10

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Solution

The fourth proportional to 108,065.70, 162,280.80 and 90,278.10 is: 135,569.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,065.70 : 162,280.80 = 90,278.10 : x
  2. Step 2: Convert to fraction form
    108,065.70/162,280.80 = 90,278.10/x
  3. Step 3: Cross multiply
    108,065.70x = 162,280.80 × 90,278.10
  4. Step 4: Simplify right side
    108,065.70x = 14,650,402,290.48
  5. Step 5: Solve for x
    x = 14,650,402,290.48/108,065.70
  6. Step 6: Final answer
    x = 135,569.40

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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.