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Finding the Fourth Proportional to 76,988.50, 106,244.45 and 41,660.50

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Solution

The fourth proportional to 76,988.50, 106,244.45 and 41,660.50 is: 57,491.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,988.50 : 106,244.45 = 41,660.50 : x
  2. Step 2: Convert to fraction form
    76,988.50/106,244.45 = 41,660.50/x
  3. Step 3: Cross multiply
    76,988.50x = 106,244.45 × 41,660.50
  4. Step 4: Simplify right side
    76,988.50x = 4,426,196,909.23
  5. Step 5: Solve for x
    x = 4,426,196,909.23/76,988.50
  6. Step 6: Final answer
    x = 57,491.66

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1.5x scale

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.