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Finding the Fourth Proportional to 98,720.25, 136,233.95 and 54,008.25

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Solution

The fourth proportional to 98,720.25, 136,233.95 and 54,008.25 is: 74,531.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,720.25 : 136,233.95 = 54,008.25 : x
  2. Step 2: Convert to fraction form
    98,720.25/136,233.95 = 54,008.25/x
  3. Step 3: Cross multiply
    98,720.25x = 136,233.95 × 54,008.25
  4. Step 4: Simplify right side
    98,720.25x = 7,357,756,960.05
  5. Step 5: Solve for x
    x = 7,357,756,960.05/98,720.25
  6. Step 6: Final answer
    x = 74,531.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.