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Finding the Fourth Proportional to 138,987.89, 191,803.62 and 75,325.67

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Solution

The fourth proportional to 138,987.89, 191,803.62 and 75,325.67 is: 103,949.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,987.89 : 191,803.62 = 75,325.67 : x
  2. Step 2: Convert to fraction form
    138,987.89/191,803.62 = 75,325.67/x
  3. Step 3: Cross multiply
    138,987.89x = 191,803.62 × 75,325.67
  4. Step 4: Simplify right side
    138,987.89x = 14,447,736,946.91
  5. Step 5: Solve for x
    x = 14,447,736,946.91/138,987.89
  6. Step 6: Final answer
    x = 103,949.61

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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.