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Finding the Fourth Proportional to 153,990.11, 212,492.52 and 85,997.65

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Solution

The fourth proportional to 153,990.11, 212,492.52 and 85,997.65 is: 118,669.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,990.11 : 212,492.52 = 85,997.65 : x
  2. Step 2: Convert to fraction form
    153,990.11/212,492.52 = 85,997.65/x
  3. Step 3: Cross multiply
    153,990.11x = 212,492.52 × 85,997.65
  4. Step 4: Simplify right side
    153,990.11x = 18,273,856,300.12
  5. Step 5: Solve for x
    x = 18,273,856,300.12/153,990.11
  6. Step 6: Final answer
    x = 118,669.03

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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.