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Finding the Fourth Proportional to 100,200.68, 138,277.85 and 68,368.89

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Solution

The fourth proportional to 100,200.68, 138,277.85 and 68,368.89 is: 94,349.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,200.68 : 138,277.85 = 68,368.89 : x
  2. Step 2: Convert to fraction form
    100,200.68/138,277.85 = 68,368.89/x
  3. Step 3: Cross multiply
    100,200.68x = 138,277.85 × 68,368.89
  4. Step 4: Simplify right side
    100,200.68x = 9,453,902,774.24
  5. Step 5: Solve for x
    x = 9,453,902,774.24/100,200.68
  6. Step 6: Final answer
    x = 94,349.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.