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Finding the Fourth Proportional to 153,876.34, 212,360.03 and 85,906.68

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Solution

The fourth proportional to 153,876.34, 212,360.03 and 85,906.68 is: 118,557.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,876.34 : 212,360.03 = 85,906.68 : x
  2. Step 2: Convert to fraction form
    153,876.34/212,360.03 = 85,906.68/x
  3. Step 3: Cross multiply
    153,876.34x = 212,360.03 × 85,906.68
  4. Step 4: Simplify right side
    153,876.34x = 18,243,145,142.00
  5. Step 5: Solve for x
    x = 18,243,145,142.00/153,876.34
  6. Step 6: Final answer
    x = 118,557.18

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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.