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Finding the Fourth Proportional to 207,389.20, 310,827.80 and 140,829.20

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Solution

The fourth proportional to 207,389.20, 310,827.80 and 140,829.20 is: 211,069.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,389.20 : 310,827.80 = 140,829.20 : x
  2. Step 2: Convert to fraction form
    207,389.20/310,827.80 = 140,829.20/x
  3. Step 3: Cross multiply
    207,389.20x = 310,827.80 × 140,829.20
  4. Step 4: Simplify right side
    207,389.20x = 43,773,630,411.76
  5. Step 5: Solve for x
    x = 43,773,630,411.76/207,389.20
  6. Step 6: Final answer
    x = 211,069.96

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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.