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Finding the Fourth Proportional to 77,991.66, 107,653.86 and 57,842.10

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Solution

The fourth proportional to 77,991.66, 107,653.86 and 57,842.10 is: 79,840.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,991.66 : 107,653.86 = 57,842.10 : x
  2. Step 2: Convert to fraction form
    77,991.66/107,653.86 = 57,842.10/x
  3. Step 3: Cross multiply
    77,991.66x = 107,653.86 × 57,842.10
  4. Step 4: Simplify right side
    77,991.66x = 6,226,925,335.51
  5. Step 5: Solve for x
    x = 6,226,925,335.51/77,991.66
  6. Step 6: Final answer
    x = 79,840.91

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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.