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Finding the Fourth Proportional to 99,087.70, 136,854.60 and 65,247.48

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Solution

The fourth proportional to 99,087.70, 136,854.60 and 65,247.48 is: 90,116.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,087.70 : 136,854.60 = 65,247.48 : x
  2. Step 2: Convert to fraction form
    99,087.70/136,854.60 = 65,247.48/x
  3. Step 3: Cross multiply
    99,087.70x = 136,854.60 × 65,247.48
  4. Step 4: Simplify right side
    99,087.70x = 8,929,417,776.41
  5. Step 5: Solve for x
    x = 8,929,417,776.41/99,087.70
  6. Step 6: Final answer
    x = 90,116.31

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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.