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Finding the Fourth Proportional to 72,780.58, 100,437.01 and 40,949.52

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Solution

The fourth proportional to 72,780.58, 100,437.01 and 40,949.52 is: 56,510.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,780.58 : 100,437.01 = 40,949.52 : x
  2. Step 2: Convert to fraction form
    72,780.58/100,437.01 = 40,949.52/x
  3. Step 3: Cross multiply
    72,780.58x = 100,437.01 × 40,949.52
  4. Step 4: Simplify right side
    72,780.58x = 4,112,847,349.74
  5. Step 5: Solve for x
    x = 4,112,847,349.74/72,780.58
  6. Step 6: Final answer
    x = 56,510.23

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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.