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Finding the Fourth Proportional to 77,857.80, 107,448.62 and 45,158.86

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Solution

The fourth proportional to 77,857.80, 107,448.62 and 45,158.86 is: 62,322.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,857.80 : 107,448.62 = 45,158.86 : x
  2. Step 2: Convert to fraction form
    77,857.80/107,448.62 = 45,158.86/x
  3. Step 3: Cross multiply
    77,857.80x = 107,448.62 × 45,158.86
  4. Step 4: Simplify right side
    77,857.80x = 4,852,257,187.77
  5. Step 5: Solve for x
    x = 4,852,257,187.77/77,857.80
  6. Step 6: Final answer
    x = 62,322.04

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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.