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Finding the Fourth Proportional to 90,995.70, 136,428.90 and 34,788.48

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Solution

The fourth proportional to 90,995.70, 136,428.90 and 34,788.48 is: 52,158.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,995.70 : 136,428.90 = 34,788.48 : x
  2. Step 2: Convert to fraction form
    90,995.70/136,428.90 = 34,788.48/x
  3. Step 3: Cross multiply
    90,995.70x = 136,428.90 × 34,788.48
  4. Step 4: Simplify right side
    90,995.70x = 4,746,154,059.07
  5. Step 5: Solve for x
    x = 4,746,154,059.07/90,995.70
  6. Step 6: Final answer
    x = 52,158.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.