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Finding the Fourth Proportional to 99,771.70, 149,730.45 and 70,247.20

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Solution

The fourth proportional to 99,771.70, 149,730.45 and 70,247.20 is: 105,422.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,771.70 : 149,730.45 = 70,247.20 : x
  2. Step 2: Convert to fraction form
    99,771.70/149,730.45 = 70,247.20/x
  3. Step 3: Cross multiply
    99,771.70x = 149,730.45 × 70,247.20
  4. Step 4: Simplify right side
    99,771.70x = 10,518,144,867.24
  5. Step 5: Solve for x
    x = 10,518,144,867.24/99,771.70
  6. Step 6: Final answer
    x = 105,422.13

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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.