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Finding the Fourth Proportional to 138,987.76, 191,803.08 and 75,325.55

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Solution

The fourth proportional to 138,987.76, 191,803.08 and 75,325.55 is: 103,949.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,987.76 : 191,803.08 = 75,325.55 : x
  2. Step 2: Convert to fraction form
    138,987.76/191,803.08 = 75,325.55/x
  3. Step 3: Cross multiply
    138,987.76x = 191,803.08 × 75,325.55
  4. Step 4: Simplify right side
    138,987.76x = 14,447,672,492.69
  5. Step 5: Solve for x
    x = 14,447,672,492.69/138,987.76
  6. Step 6: Final answer
    x = 103,949.24

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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.