Home / 99,705.40-149,558.10-90,719.80

Finding the Fourth Proportional to 99,705.40, 149,558.10 and 90,719.80

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Solution

The fourth proportional to 99,705.40, 149,558.10 and 90,719.80 is: 136,079.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,705.40 : 149,558.10 = 90,719.80 : x
  2. Step 2: Convert to fraction form
    99,705.40/149,558.10 = 90,719.80/x
  3. Step 3: Cross multiply
    99,705.40x = 149,558.10 × 90,719.80
  4. Step 4: Simplify right side
    99,705.40x = 13,567,880,920.38
  5. Step 5: Solve for x
    x = 13,567,880,920.38/99,705.40
  6. Step 6: Final answer
    x = 136,079.70

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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.