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Finding the Fourth Proportional to 98,312.96, 135,620.16 and 66,492.56

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Solution

The fourth proportional to 98,312.96, 135,620.16 and 66,492.56 is: 91,724.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,312.96 : 135,620.16 = 66,492.56 : x
  2. Step 2: Convert to fraction form
    98,312.96/135,620.16 = 66,492.56/x
  3. Step 3: Cross multiply
    98,312.96x = 135,620.16 × 66,492.56
  4. Step 4: Simplify right side
    98,312.96x = 9,017,731,626.01
  5. Step 5: Solve for x
    x = 9,017,731,626.01/98,312.96
  6. Step 6: Final answer
    x = 91,724.75

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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.