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Finding the Fourth Proportional to 153,803.19, 212,264.85 and 85,843.79

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Solution

The fourth proportional to 153,803.19, 212,264.85 and 85,843.79 is: 118,473.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,803.19 : 212,264.85 = 85,843.79 : x
  2. Step 2: Convert to fraction form
    153,803.19/212,264.85 = 85,843.79/x
  3. Step 3: Cross multiply
    153,803.19x = 212,264.85 × 85,843.79
  4. Step 4: Simplify right side
    153,803.19x = 18,221,619,207.78
  5. Step 5: Solve for x
    x = 18,221,619,207.78/153,803.19
  6. Step 6: Final answer
    x = 118,473.61

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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.