Home / 77,315.64-115,973.54-21,151.59

Finding the Fourth Proportional to 77,315.64, 115,973.54 and 21,151.59

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Solution

The fourth proportional to 77,315.64, 115,973.54 and 21,151.59 is: 31,727.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,315.64 : 115,973.54 = 21,151.59 : x
  2. Step 2: Convert to fraction form
    77,315.64/115,973.54 = 21,151.59/x
  3. Step 3: Cross multiply
    77,315.64x = 115,973.54 × 21,151.59
  4. Step 4: Simplify right side
    77,315.64x = 2,453,024,663.17
  5. Step 5: Solve for x
    x = 2,453,024,663.17/77,315.64
  6. Step 6: Final answer
    x = 31,727.41

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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.