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Finding the Fourth Proportional to 109,909.80, 164,864.70 and 43,313.67

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Solution

The fourth proportional to 109,909.80, 164,864.70 and 43,313.67 is: 64,970.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,909.80 : 164,864.70 = 43,313.67 : x
  2. Step 2: Convert to fraction form
    109,909.80/164,864.70 = 43,313.67/x
  3. Step 3: Cross multiply
    109,909.80x = 164,864.70 × 43,313.67
  4. Step 4: Simplify right side
    109,909.80x = 7,140,895,210.45
  5. Step 5: Solve for x
    x = 7,140,895,210.45/109,909.80
  6. Step 6: Final answer
    x = 64,970.51

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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.