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Finding the Fourth Proportional to 103,656.96, 155,296.81 and 72,000.14

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Solution

The fourth proportional to 103,656.96, 155,296.81 and 72,000.14 is: 107,869.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,656.96 : 155,296.81 = 72,000.14 : x
  2. Step 2: Convert to fraction form
    103,656.96/155,296.81 = 72,000.14/x
  3. Step 3: Cross multiply
    103,656.96x = 155,296.81 × 72,000.14
  4. Step 4: Simplify right side
    103,656.96x = 11,181,391,375.07
  5. Step 5: Solve for x
    x = 11,181,391,375.07/103,656.96
  6. Step 6: Final answer
    x = 107,869.18

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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.