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Finding the Fourth Proportional to 98,920.88, 148,388.17 and 39,756.60

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Solution

The fourth proportional to 98,920.88, 148,388.17 and 39,756.60 is: 59,637.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,920.88 : 148,388.17 = 39,756.60 : x
  2. Step 2: Convert to fraction form
    98,920.88/148,388.17 = 39,756.60/x
  3. Step 3: Cross multiply
    98,920.88x = 148,388.17 × 39,756.60
  4. Step 4: Simplify right side
    98,920.88x = 5,899,409,119.42
  5. Step 5: Solve for x
    x = 5,899,409,119.42/98,920.88
  6. Step 6: Final answer
    x = 59,637.65

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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.