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Finding the Fourth Proportional to 108,424.40, 162,319.80 and 77,320.40

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Solution

The fourth proportional to 108,424.40, 162,319.80 and 77,320.40 is: 115,754.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,424.40 : 162,319.80 = 77,320.40 : x
  2. Step 2: Convert to fraction form
    108,424.40/162,319.80 = 77,320.40/x
  3. Step 3: Cross multiply
    108,424.40x = 162,319.80 × 77,320.40
  4. Step 4: Simplify right side
    108,424.40x = 12,550,631,863.92
  5. Step 5: Solve for x
    x = 12,550,631,863.92/108,424.40
  6. Step 6: Final answer
    x = 115,754.68

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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.