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Finding the Fourth Proportional to 249,656.40, 374,505.21 and 81,172.89

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Solution

The fourth proportional to 249,656.40, 374,505.21 and 81,172.89 is: 121,766.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,656.40 : 374,505.21 = 81,172.89 : x
  2. Step 2: Convert to fraction form
    249,656.40/374,505.21 = 81,172.89/x
  3. Step 3: Cross multiply
    249,656.40x = 374,505.21 × 81,172.89
  4. Step 4: Simplify right side
    249,656.40x = 30,399,670,215.76
  5. Step 5: Solve for x
    x = 30,399,670,215.76/249,656.40
  6. Step 6: Final answer
    x = 121,766.04

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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.