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Finding the Fourth Proportional to 121,111.49, 181,693.49 and 36,869.45

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Solution

The fourth proportional to 121,111.49, 181,693.49 and 36,869.45 is: 55,312.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,111.49 : 181,693.49 = 36,869.45 : x
  2. Step 2: Convert to fraction form
    121,111.49/181,693.49 = 36,869.45/x
  3. Step 3: Cross multiply
    121,111.49x = 181,693.49 × 36,869.45
  4. Step 4: Simplify right side
    121,111.49x = 6,698,937,952.07
  5. Step 5: Solve for x
    x = 6,698,937,952.07/121,111.49
  6. Step 6: Final answer
    x = 55,312.16

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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.