Home / 81,035.10-121,552.79-21,870.81

Finding the Fourth Proportional to 81,035.10, 121,552.79 and 21,870.81

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Solution

The fourth proportional to 81,035.10, 121,552.79 and 21,870.81 is: 32,806.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,035.10 : 121,552.79 = 21,870.81 : x
  2. Step 2: Convert to fraction form
    81,035.10/121,552.79 = 21,870.81/x
  3. Step 3: Cross multiply
    81,035.10x = 121,552.79 × 21,870.81
  4. Step 4: Simplify right side
    81,035.10x = 2,658,457,865.71
  5. Step 5: Solve for x
    x = 2,658,457,865.71/81,035.10
  6. Step 6: Final answer
    x = 32,806.25

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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.