Home / 77,920.84-107,530.77-42,110.79

Finding the Fourth Proportional to 77,920.84, 107,530.77 and 42,110.79

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Solution

The fourth proportional to 77,920.84, 107,530.77 and 42,110.79 is: 58,112.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,920.84 : 107,530.77 = 42,110.79 : x
  2. Step 2: Convert to fraction form
    77,920.84/107,530.77 = 42,110.79/x
  3. Step 3: Cross multiply
    77,920.84x = 107,530.77 × 42,110.79
  4. Step 4: Simplify right side
    77,920.84x = 4,528,205,674.01
  5. Step 5: Solve for x
    x = 4,528,205,674.01/77,920.84
  6. Step 6: Final answer
    x = 58,112.90

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1.5x scale

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.