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Finding the Fourth Proportional to 121,812.40, 182,653.80 and 51,612.40

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Solution

The fourth proportional to 121,812.40, 182,653.80 and 51,612.40 is: 77,391.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,812.40 : 182,653.80 = 51,612.40 : x
  2. Step 2: Convert to fraction form
    121,812.40/182,653.80 = 51,612.40/x
  3. Step 3: Cross multiply
    121,812.40x = 182,653.80 × 51,612.40
  4. Step 4: Simplify right side
    121,812.40x = 9,427,200,987.12
  5. Step 5: Solve for x
    x = 9,427,200,987.12/121,812.40
  6. Step 6: Final answer
    x = 77,391.14

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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.