Home / 140,134.16-209,825.40-87,438.80

Finding the Fourth Proportional to 140,134.16, 209,825.40 and 87,438.80

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Solution

The fourth proportional to 140,134.16, 209,825.40 and 87,438.80 is: 130,923.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,134.16 : 209,825.40 = 87,438.80 : x
  2. Step 2: Convert to fraction form
    140,134.16/209,825.40 = 87,438.80/x
  3. Step 3: Cross multiply
    140,134.16x = 209,825.40 × 87,438.80
  4. Step 4: Simplify right side
    140,134.16x = 18,346,881,185.52
  5. Step 5: Solve for x
    x = 18,346,881,185.52/140,134.16
  6. Step 6: Final answer
    x = 130,923.69

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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.