Home / 291,909.11-438,036.60-123,420.20

Finding the Fourth Proportional to 291,909.11, 438,036.60 and 123,420.20

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Solution

The fourth proportional to 291,909.11, 438,036.60 and 123,420.20 is: 185,203.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,909.11 : 438,036.60 = 123,420.20 : x
  2. Step 2: Convert to fraction form
    291,909.11/438,036.60 = 123,420.20/x
  3. Step 3: Cross multiply
    291,909.11x = 438,036.60 × 123,420.20
  4. Step 4: Simplify right side
    291,909.11x = 54,062,564,779.32
  5. Step 5: Solve for x
    x = 54,062,564,779.32/291,909.11
  6. Step 6: Final answer
    x = 185,203.42

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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.