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Finding the Fourth Proportional to 153,990.23, 212,492.69 and 85,997.77

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Solution

The fourth proportional to 153,990.23, 212,492.69 and 85,997.77 is: 118,669.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,990.23 : 212,492.69 = 85,997.77 : x
  2. Step 2: Convert to fraction form
    153,990.23/212,492.69 = 85,997.77/x
  3. Step 3: Cross multiply
    153,990.23x = 212,492.69 × 85,997.77
  4. Step 4: Simplify right side
    153,990.23x = 18,273,897,481.30
  5. Step 5: Solve for x
    x = 18,273,897,481.30/153,990.23
  6. Step 6: Final answer
    x = 118,669.20

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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.