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Finding the Fourth Proportional to 70,576.80, 105,865.20 and 65,109.30

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Solution

The fourth proportional to 70,576.80, 105,865.20 and 65,109.30 is: 97,663.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,576.80 : 105,865.20 = 65,109.30 : x
  2. Step 2: Convert to fraction form
    70,576.80/105,865.20 = 65,109.30/x
  3. Step 3: Cross multiply
    70,576.80x = 105,865.20 × 65,109.30
  4. Step 4: Simplify right side
    70,576.80x = 6,892,809,066.36
  5. Step 5: Solve for x
    x = 6,892,809,066.36/70,576.80
  6. Step 6: Final answer
    x = 97,663.95

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1.5x scale

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.