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Finding the Fourth Proportional to 121,543.20, 182,314.80 and 42,649.20

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Solution

The fourth proportional to 121,543.20, 182,314.80 and 42,649.20 is: 63,973.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,543.20 : 182,314.80 = 42,649.20 : x
  2. Step 2: Convert to fraction form
    121,543.20/182,314.80 = 42,649.20/x
  3. Step 3: Cross multiply
    121,543.20x = 182,314.80 × 42,649.20
  4. Step 4: Simplify right side
    121,543.20x = 7,775,580,368.16
  5. Step 5: Solve for x
    x = 7,775,580,368.16/121,543.20
  6. Step 6: Final answer
    x = 63,973.80

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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.