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Finding the Fourth Proportional to 72,966.24, 100,680.80 and 42,328.24

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Solution

The fourth proportional to 72,966.24, 100,680.80 and 42,328.24 is: 58,405.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,966.24 : 100,680.80 = 42,328.24 : x
  2. Step 2: Convert to fraction form
    72,966.24/100,680.80 = 42,328.24/x
  3. Step 3: Cross multiply
    72,966.24x = 100,680.80 × 42,328.24
  4. Step 4: Simplify right side
    72,966.24x = 4,261,641,065.79
  5. Step 5: Solve for x
    x = 4,261,641,065.79/72,966.24
  6. Step 6: Final answer
    x = 58,405.66

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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.