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Finding the Fourth Proportional to 121,281.51, 181,700.59 and 87,918.82

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Solution

The fourth proportional to 121,281.51, 181,700.59 and 87,918.82 is: 131,717.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,281.51 : 181,700.59 = 87,918.82 : x
  2. Step 2: Convert to fraction form
    121,281.51/181,700.59 = 87,918.82/x
  3. Step 3: Cross multiply
    121,281.51x = 181,700.59 × 87,918.82
  4. Step 4: Simplify right side
    121,281.51x = 15,974,901,466.10
  5. Step 5: Solve for x
    x = 15,974,901,466.10/121,281.51
  6. Step 6: Final answer
    x = 131,717.53

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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.