Home / 100,931.20-151,199.96-86,890.66

Finding the Fourth Proportional to 100,931.20, 151,199.96 and 86,890.66

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Solution

The fourth proportional to 100,931.20, 151,199.96 and 86,890.66 is: 130,166.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,931.20 : 151,199.96 = 86,890.66 : x
  2. Step 2: Convert to fraction form
    100,931.20/151,199.96 = 86,890.66/x
  3. Step 3: Cross multiply
    100,931.20x = 151,199.96 × 86,890.66
  4. Step 4: Simplify right side
    100,931.20x = 13,137,864,316.37
  5. Step 5: Solve for x
    x = 13,137,864,316.37/100,931.20
  6. Step 6: Final answer
    x = 130,166.53

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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.