Home / 99,715.32-149,642.98-90,186.68

Finding the Fourth Proportional to 99,715.32, 149,642.98 and 90,186.68

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Solution

The fourth proportional to 99,715.32, 149,642.98 and 90,186.68 is: 135,343.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,715.32 : 149,642.98 = 90,186.68 : x
  2. Step 2: Convert to fraction form
    99,715.32/149,642.98 = 90,186.68/x
  3. Step 3: Cross multiply
    99,715.32x = 149,642.98 × 90,186.68
  4. Step 4: Simplify right side
    99,715.32x = 13,495,803,700.15
  5. Step 5: Solve for x
    x = 13,495,803,700.15/99,715.32
  6. Step 6: Final answer
    x = 135,343.33

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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.