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Finding the Fourth Proportional to 103,630.64, 155,445.95 and 68,562.09

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Solution

The fourth proportional to 103,630.64, 155,445.95 and 68,562.09 is: 102,843.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,630.64 : 155,445.95 = 68,562.09 : x
  2. Step 2: Convert to fraction form
    103,630.64/155,445.95 = 68,562.09/x
  3. Step 3: Cross multiply
    103,630.64x = 155,445.95 × 68,562.09
  4. Step 4: Simplify right side
    103,630.64x = 10,657,699,214.04
  5. Step 5: Solve for x
    x = 10,657,699,214.04/103,630.64
  6. Step 6: Final answer
    x = 102,843.13

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1.5x scale

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.