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Finding the Fourth Proportional to 113,989.88, 170,968.84 and 39,108.80

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Solution

The fourth proportional to 113,989.88, 170,968.84 and 39,108.80 is: 58,657.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,989.88 : 170,968.84 = 39,108.80 : x
  2. Step 2: Convert to fraction form
    113,989.88/170,968.84 = 39,108.80/x
  3. Step 3: Cross multiply
    113,989.88x = 170,968.84 × 39,108.80
  4. Step 4: Simplify right side
    113,989.88x = 6,686,386,169.79
  5. Step 5: Solve for x
    x = 6,686,386,169.79/113,989.88
  6. Step 6: Final answer
    x = 58,657.72

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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.