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Finding the Fourth Proportional to 153,701.97, 212,108.31 and 85,719.03

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Solution

The fourth proportional to 153,701.97, 212,108.31 and 85,719.03 is: 118,292.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,701.97 : 212,108.31 = 85,719.03 : x
  2. Step 2: Convert to fraction form
    153,701.97/212,108.31 = 85,719.03/x
  3. Step 3: Cross multiply
    153,701.97x = 212,108.31 × 85,719.03
  4. Step 4: Simplify right side
    153,701.97x = 18,181,718,588.14
  5. Step 5: Solve for x
    x = 18,181,718,588.14/153,701.97
  6. Step 6: Final answer
    x = 118,292.03

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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.