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Finding the Fourth Proportional to 153,677.52, 212,047.74 and 85,689.09

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Solution

The fourth proportional to 153,677.52, 212,047.74 and 85,689.09 is: 118,235.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,677.52 : 212,047.74 = 85,689.09 : x
  2. Step 2: Convert to fraction form
    153,677.52/212,047.74 = 85,689.09/x
  3. Step 3: Cross multiply
    153,677.52x = 212,047.74 × 85,689.09
  4. Step 4: Simplify right side
    153,677.52x = 18,170,177,877.16
  5. Step 5: Solve for x
    x = 18,170,177,877.16/153,677.52
  6. Step 6: Final answer
    x = 118,235.76

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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.