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Finding the Fourth Proportional to 99,672.40, 149,508.60 and 90,924.40

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Solution

The fourth proportional to 99,672.40, 149,508.60 and 90,924.40 is: 136,386.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,672.40 : 149,508.60 = 90,924.40 : x
  2. Step 2: Convert to fraction form
    99,672.40/149,508.60 = 90,924.40/x
  3. Step 3: Cross multiply
    99,672.40x = 149,508.60 × 90,924.40
  4. Step 4: Simplify right side
    99,672.40x = 13,593,979,749.84
  5. Step 5: Solve for x
    x = 13,593,979,749.84/99,672.40
  6. Step 6: Final answer
    x = 136,386.60

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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.