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Finding the Fourth Proportional to 121,187.55, 181,810.17 and 61,068.30

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Solution

The fourth proportional to 121,187.55, 181,810.17 and 61,068.30 is: 91,616.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,187.55 : 181,810.17 = 61,068.30 : x
  2. Step 2: Convert to fraction form
    121,187.55/181,810.17 = 61,068.30/x
  3. Step 3: Cross multiply
    121,187.55x = 181,810.17 × 61,068.30
  4. Step 4: Simplify right side
    121,187.55x = 11,102,838,457.39
  5. Step 5: Solve for x
    x = 11,102,838,457.39/121,187.55
  6. Step 6: Final answer
    x = 91,616.99

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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.