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Finding the Fourth Proportional to 153,876.28, 212,348.46 and 85,889.32

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Solution

The fourth proportional to 153,876.28, 212,348.46 and 85,889.32 is: 118,526.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,876.28 : 212,348.46 = 85,889.32 : x
  2. Step 2: Convert to fraction form
    153,876.28/212,348.46 = 85,889.32/x
  3. Step 3: Cross multiply
    153,876.28x = 212,348.46 × 85,889.32
  4. Step 4: Simplify right side
    153,876.28x = 18,238,464,832.45
  5. Step 5: Solve for x
    x = 18,238,464,832.45/153,876.28
  6. Step 6: Final answer
    x = 118,526.81

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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.