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Finding the Fourth Proportional to 72,680.40, 100,015.56 and 64,316.88

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Solution

The fourth proportional to 72,680.40, 100,015.56 and 64,316.88 is: 88,506.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,680.40 : 100,015.56 = 64,316.88 : x
  2. Step 2: Convert to fraction form
    72,680.40/100,015.56 = 64,316.88/x
  3. Step 3: Cross multiply
    72,680.40x = 100,015.56 × 64,316.88
  4. Step 4: Simplify right side
    72,680.40x = 6,432,688,770.65
  5. Step 5: Solve for x
    x = 6,432,688,770.65/72,680.40
  6. Step 6: Final answer
    x = 88,506.51

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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.