Home / 72,690.87-100,298.70-42,470.36

Finding the Fourth Proportional to 72,690.87, 100,298.70 and 42,470.36

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Solution

The fourth proportional to 72,690.87, 100,298.70 and 42,470.36 is: 58,600.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,690.87 : 100,298.70 = 42,470.36 : x
  2. Step 2: Convert to fraction form
    72,690.87/100,298.70 = 42,470.36/x
  3. Step 3: Cross multiply
    72,690.87x = 100,298.70 × 42,470.36
  4. Step 4: Simplify right side
    72,690.87x = 4,259,721,896.53
  5. Step 5: Solve for x
    x = 4,259,721,896.53/72,690.87
  6. Step 6: Final answer
    x = 58,600.51

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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.