Home / 77,971.13-116,938.79-21,815.18

Finding the Fourth Proportional to 77,971.13, 116,938.79 and 21,815.18

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Solution

The fourth proportional to 77,971.13, 116,938.79 and 21,815.18 is: 32,717.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,971.13 : 116,938.79 = 21,815.18 : x
  2. Step 2: Convert to fraction form
    77,971.13/116,938.79 = 21,815.18/x
  3. Step 3: Cross multiply
    77,971.13x = 116,938.79 × 21,815.18
  4. Step 4: Simplify right side
    77,971.13x = 2,551,040,643.76
  5. Step 5: Solve for x
    x = 2,551,040,643.76/77,971.13
  6. Step 6: Final answer
    x = 32,717.76

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1.5x scale

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.