Home / 77,921.84-107,532.15-42,111.79

Finding the Fourth Proportional to 77,921.84, 107,532.15 and 42,111.79

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Solution

The fourth proportional to 77,921.84, 107,532.15 and 42,111.79 is: 58,114.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,921.84 : 107,532.15 = 42,111.79 : x
  2. Step 2: Convert to fraction form
    77,921.84/107,532.15 = 42,111.79/x
  3. Step 3: Cross multiply
    77,921.84x = 107,532.15 × 42,111.79
  4. Step 4: Simplify right side
    77,921.84x = 4,528,371,319.05
  5. Step 5: Solve for x
    x = 4,528,371,319.05/77,921.84
  6. Step 6: Final answer
    x = 58,114.28

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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.