Home / 100,977.05-151,301.55-86,870.90

Finding the Fourth Proportional to 100,977.05, 151,301.55 and 86,870.90

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Solution

The fourth proportional to 100,977.05, 151,301.55 and 86,870.90 is: 130,165.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,977.05 : 151,301.55 = 86,870.90 : x
  2. Step 2: Convert to fraction form
    100,977.05/151,301.55 = 86,870.90/x
  3. Step 3: Cross multiply
    100,977.05x = 151,301.55 × 86,870.90
  4. Step 4: Simplify right side
    100,977.05x = 13,143,701,819.90
  5. Step 5: Solve for x
    x = 13,143,701,819.90/100,977.05
  6. Step 6: Final answer
    x = 130,165.24

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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.