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Finding the Fourth Proportional to 85,491.50, 118,011.18 and 76,523.18

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Solution

The fourth proportional to 85,491.50, 118,011.18 and 76,523.18 is: 105,631.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,491.50 : 118,011.18 = 76,523.18 : x
  2. Step 2: Convert to fraction form
    85,491.50/118,011.18 = 76,523.18/x
  3. Step 3: Cross multiply
    85,491.50x = 118,011.18 × 76,523.18
  4. Step 4: Simplify right side
    85,491.50x = 9,030,590,769.15
  5. Step 5: Solve for x
    x = 9,030,590,769.15/85,491.50
  6. Step 6: Final answer
    x = 105,631.45

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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.