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Finding the Fourth Proportional to 109,458.95, 151,031.99 and 66,987.41

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Solution

The fourth proportional to 109,458.95, 151,031.99 and 66,987.41 is: 92,429.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,458.95 : 151,031.99 = 66,987.41 : x
  2. Step 2: Convert to fraction form
    109,458.95/151,031.99 = 66,987.41/x
  3. Step 3: Cross multiply
    109,458.95x = 151,031.99 × 66,987.41
  4. Step 4: Simplify right side
    109,458.95x = 10,117,241,249.55
  5. Step 5: Solve for x
    x = 10,117,241,249.55/109,458.95
  6. Step 6: Final answer
    x = 92,429.55

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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.