Home / 100,979.20-151,372.80-37,782.40

Finding the Fourth Proportional to 100,979.20, 151,372.80 and 37,782.40

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Solution

The fourth proportional to 100,979.20, 151,372.80 and 37,782.40 is: 56,637.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,979.20 : 151,372.80 = 37,782.40 : x
  2. Step 2: Convert to fraction form
    100,979.20/151,372.80 = 37,782.40/x
  3. Step 3: Cross multiply
    100,979.20x = 151,372.80 × 37,782.40
  4. Step 4: Simplify right side
    100,979.20x = 5,719,227,678.72
  5. Step 5: Solve for x
    x = 5,719,227,678.72/100,979.20
  6. Step 6: Final answer
    x = 56,637.68

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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.