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Finding the Fourth Proportional to 98,694.84, 136,152.72 and 64,694.28

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Solution

The fourth proportional to 98,694.84, 136,152.72 and 64,694.28 is: 89,247.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,694.84 : 136,152.72 = 64,694.28 : x
  2. Step 2: Convert to fraction form
    98,694.84/136,152.72 = 64,694.28/x
  3. Step 3: Cross multiply
    98,694.84x = 136,152.72 × 64,694.28
  4. Step 4: Simplify right side
    98,694.84x = 8,808,302,190.44
  5. Step 5: Solve for x
    x = 8,808,302,190.44/98,694.84
  6. Step 6: Final answer
    x = 89,247.85

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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.