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Finding the Fourth Proportional to 121,186.63, 181,862.99 and 42,300.87

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Solution

The fourth proportional to 121,186.63, 181,862.99 and 42,300.87 is: 63,480.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,186.63 : 181,862.99 = 42,300.87 : x
  2. Step 2: Convert to fraction form
    121,186.63/181,862.99 = 42,300.87/x
  3. Step 3: Cross multiply
    121,186.63x = 181,862.99 × 42,300.87
  4. Step 4: Simplify right side
    121,186.63x = 7,692,961,962.94
  5. Step 5: Solve for x
    x = 7,692,961,962.94/121,186.63
  6. Step 6: Final answer
    x = 63,480.29

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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.