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Finding the Fourth Proportional to 108,330.40, 162,178.80 and 77,226.40

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Solution

The fourth proportional to 108,330.40, 162,178.80 and 77,226.40 is: 115,613.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,330.40 : 162,178.80 = 77,226.40 : x
  2. Step 2: Convert to fraction form
    108,330.40/162,178.80 = 77,226.40/x
  3. Step 3: Cross multiply
    108,330.40x = 162,178.80 × 77,226.40
  4. Step 4: Simplify right side
    108,330.40x = 12,524,484,880.32
  5. Step 5: Solve for x
    x = 12,524,484,880.32/108,330.40
  6. Step 6: Final answer
    x = 115,613.76

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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.