Home / 120,938.40-181,461.60-42,109.20

Finding the Fourth Proportional to 120,938.40, 181,461.60 and 42,109.20

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Solution

The fourth proportional to 120,938.40, 181,461.60 and 42,109.20 is: 63,182.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,938.40 : 181,461.60 = 42,109.20 : x
  2. Step 2: Convert to fraction form
    120,938.40/181,461.60 = 42,109.20/x
  3. Step 3: Cross multiply
    120,938.40x = 181,461.60 × 42,109.20
  4. Step 4: Simplify right side
    120,938.40x = 7,641,202,806.72
  5. Step 5: Solve for x
    x = 7,641,202,806.72/120,938.40
  6. Step 6: Final answer
    x = 63,182.60

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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.