Home / 106,429.20-159,643.80-87,402.30

Finding the Fourth Proportional to 106,429.20, 159,643.80 and 87,402.30

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Solution

The fourth proportional to 106,429.20, 159,643.80 and 87,402.30 is: 131,103.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,429.20 : 159,643.80 = 87,402.30 : x
  2. Step 2: Convert to fraction form
    106,429.20/159,643.80 = 87,402.30/x
  3. Step 3: Cross multiply
    106,429.20x = 159,643.80 × 87,402.30
  4. Step 4: Simplify right side
    106,429.20x = 13,953,235,300.74
  5. Step 5: Solve for x
    x = 13,953,235,300.74/106,429.20
  6. Step 6: Final answer
    x = 131,103.45

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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.