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Finding the Fourth Proportional to 153,655.68, 212,025.60 and 85,656

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Solution

The fourth proportional to 153,655.68, 212,025.60 and 85,656 is: 118,194.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,655.68 : 212,025.60 = 85,656 : x
  2. Step 2: Convert to fraction form
    153,655.68/212,025.60 = 85,656/x
  3. Step 3: Cross multiply
    153,655.68x = 212,025.60 × 85,656
  4. Step 4: Simplify right side
    153,655.68x = 18,161,264,793.60
  5. Step 5: Solve for x
    x = 18,161,264,793.60/153,655.68
  6. Step 6: Final answer
    x = 118,194.56

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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.