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Finding the Fourth Proportional to 100,010.61, 137,949.62 and 64,143.81

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Solution

The fourth proportional to 100,010.61, 137,949.62 and 64,143.81 is: 88,476.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,010.61 : 137,949.62 = 64,143.81 : x
  2. Step 2: Convert to fraction form
    100,010.61/137,949.62 = 64,143.81/x
  3. Step 3: Cross multiply
    100,010.61x = 137,949.62 × 64,143.81
  4. Step 4: Simplify right side
    100,010.61x = 8,848,613,894.13
  5. Step 5: Solve for x
    x = 8,848,613,894.13/100,010.61
  6. Step 6: Final answer
    x = 88,476.75

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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.