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Finding the Fourth Proportional to 323,543.10, 485,314.65 and 86,909.70

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Solution

The fourth proportional to 323,543.10, 485,314.65 and 86,909.70 is: 130,364.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,543.10 : 485,314.65 = 86,909.70 : x
  2. Step 2: Convert to fraction form
    323,543.10/485,314.65 = 86,909.70/x
  3. Step 3: Cross multiply
    323,543.10x = 485,314.65 × 86,909.70
  4. Step 4: Simplify right side
    323,543.10x = 42,178,550,637.11
  5. Step 5: Solve for x
    x = 42,178,550,637.11/323,543.10
  6. Step 6: Final answer
    x = 130,364.55

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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.