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Finding the Fourth Proportional to 108,280.80, 162,421.20 and 61,624.80

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Solution

The fourth proportional to 108,280.80, 162,421.20 and 61,624.80 is: 92,437.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,280.80 : 162,421.20 = 61,624.80 : x
  2. Step 2: Convert to fraction form
    108,280.80/162,421.20 = 61,624.80/x
  3. Step 3: Cross multiply
    108,280.80x = 162,421.20 × 61,624.80
  4. Step 4: Simplify right side
    108,280.80x = 10,009,173,965.76
  5. Step 5: Solve for x
    x = 10,009,173,965.76/108,280.80
  6. Step 6: Final answer
    x = 92,437.20

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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.