Home / 121,235.10-181,809.45-42,351.90

Finding the Fourth Proportional to 121,235.10, 181,809.45 and 42,351.90

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Solution

The fourth proportional to 121,235.10, 181,809.45 and 42,351.90 is: 63,512.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,235.10 : 181,809.45 = 42,351.90 : x
  2. Step 2: Convert to fraction form
    121,235.10/181,809.45 = 42,351.90/x
  3. Step 3: Cross multiply
    121,235.10x = 181,809.45 × 42,351.90
  4. Step 4: Simplify right side
    121,235.10x = 7,699,975,645.46
  5. Step 5: Solve for x
    x = 7,699,975,645.46/121,235.10
  6. Step 6: Final answer
    x = 63,512.76

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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.