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Finding the Fourth Proportional to 121,108.80, 181,663.20 and 90,004.80

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Solution

The fourth proportional to 121,108.80, 181,663.20 and 90,004.80 is: 135,007.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,108.80 : 181,663.20 = 90,004.80 : x
  2. Step 2: Convert to fraction form
    121,108.80/181,663.20 = 90,004.80/x
  3. Step 3: Cross multiply
    121,108.80x = 181,663.20 × 90,004.80
  4. Step 4: Simplify right side
    121,108.80x = 16,350,559,983.36
  5. Step 5: Solve for x
    x = 16,350,559,983.36/121,108.80
  6. Step 6: Final answer
    x = 135,007.20

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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.