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Finding the Fourth Proportional to 121,104.30, 181,656.45 and 90,000.30

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Solution

The fourth proportional to 121,104.30, 181,656.45 and 90,000.30 is: 135,000.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,104.30 : 181,656.45 = 90,000.30 : x
  2. Step 2: Convert to fraction form
    121,104.30/181,656.45 = 90,000.30/x
  3. Step 3: Cross multiply
    121,104.30x = 181,656.45 × 90,000.30
  4. Step 4: Simplify right side
    121,104.30x = 16,349,134,996.94
  5. Step 5: Solve for x
    x = 16,349,134,996.94/121,104.30
  6. Step 6: Final answer
    x = 135,000.45

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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.