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Finding the Fourth Proportional to 162,461.60, 243,562.80 and 68,890.40

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Solution

The fourth proportional to 162,461.60, 243,562.80 and 68,890.40 is: 103,280.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,461.60 : 243,562.80 = 68,890.40 : x
  2. Step 2: Convert to fraction form
    162,461.60/243,562.80 = 68,890.40/x
  3. Step 3: Cross multiply
    162,461.60x = 243,562.80 × 68,890.40
  4. Step 4: Simplify right side
    162,461.60x = 16,779,138,717.12
  5. Step 5: Solve for x
    x = 16,779,138,717.12/162,461.60
  6. Step 6: Final answer
    x = 103,280.64

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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.