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Finding the Fourth Proportional to 99,085.70, 136,851.84 and 65,245.47

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Solution

The fourth proportional to 99,085.70, 136,851.84 and 65,245.47 is: 90,113.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,085.70 : 136,851.84 = 65,245.47 : x
  2. Step 2: Convert to fraction form
    99,085.70/136,851.84 = 65,245.47/x
  3. Step 3: Cross multiply
    99,085.70x = 136,851.84 × 65,245.47
  4. Step 4: Simplify right side
    99,085.70x = 8,928,962,621.16
  5. Step 5: Solve for x
    x = 8,928,962,621.16/99,085.70
  6. Step 6: Final answer
    x = 90,113.53

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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.