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Finding the Fourth Proportional to 153,543.78, 211,887.24 and 85,560.48

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Solution

The fourth proportional to 153,543.78, 211,887.24 and 85,560.48 is: 118,071.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,543.78 : 211,887.24 = 85,560.48 : x
  2. Step 2: Convert to fraction form
    153,543.78/211,887.24 = 85,560.48/x
  3. Step 3: Cross multiply
    153,543.78x = 211,887.24 × 85,560.48
  4. Step 4: Simplify right side
    153,543.78x = 18,129,173,960.28
  5. Step 5: Solve for x
    x = 18,129,173,960.28/153,543.78
  6. Step 6: Final answer
    x = 118,071.69

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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.