Home / 121,121.40-181,617.30-42,238.20

Finding the Fourth Proportional to 121,121.40, 181,617.30 and 42,238.20

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Solution

The fourth proportional to 121,121.40, 181,617.30 and 42,238.20 is: 63,334.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,121.40 : 181,617.30 = 42,238.20 : x
  2. Step 2: Convert to fraction form
    121,121.40/181,617.30 = 42,238.20/x
  3. Step 3: Cross multiply
    121,121.40x = 181,617.30 × 42,238.20
  4. Step 4: Simplify right side
    121,121.40x = 7,671,187,840.86
  5. Step 5: Solve for x
    x = 7,671,187,840.86/121,121.40
  6. Step 6: Final answer
    x = 63,334.70

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1.5x scale

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.