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Finding the Fourth Proportional to 66,987.42, 100,554.93 and 38,939.10

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Solution

The fourth proportional to 66,987.42, 100,554.93 and 38,939.10 is: 58,451.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,987.42 : 100,554.93 = 38,939.10 : x
  2. Step 2: Convert to fraction form
    66,987.42/100,554.93 = 38,939.10/x
  3. Step 3: Cross multiply
    66,987.42x = 100,554.93 × 38,939.10
  4. Step 4: Simplify right side
    66,987.42x = 3,915,518,474.76
  5. Step 5: Solve for x
    x = 3,915,518,474.76/66,987.42
  6. Step 6: Final answer
    x = 58,451.55

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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.