Home / 142,799.20-213,939.60-87,330.40

Finding the Fourth Proportional to 142,799.20, 213,939.60 and 87,330.40

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Solution

The fourth proportional to 142,799.20, 213,939.60 and 87,330.40 is: 130,837.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,799.20 : 213,939.60 = 87,330.40 : x
  2. Step 2: Convert to fraction form
    142,799.20/213,939.60 = 87,330.40/x
  3. Step 3: Cross multiply
    142,799.20x = 213,939.60 × 87,330.40
  4. Step 4: Simplify right side
    142,799.20x = 18,683,430,843.84
  5. Step 5: Solve for x
    x = 18,683,430,843.84/142,799.20
  6. Step 6: Final answer
    x = 130,837.08

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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.