Home / 99,811.41-137,739.80-57,369.84

Finding the Fourth Proportional to 99,811.41, 137,739.80 and 57,369.84

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Solution

The fourth proportional to 99,811.41, 137,739.80 and 57,369.84 is: 79,170.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,811.41 : 137,739.80 = 57,369.84 : x
  2. Step 2: Convert to fraction form
    99,811.41/137,739.80 = 57,369.84/x
  3. Step 3: Cross multiply
    99,811.41x = 137,739.80 × 57,369.84
  4. Step 4: Simplify right side
    99,811.41x = 7,902,109,312.08
  5. Step 5: Solve for x
    x = 7,902,109,312.08/99,811.41
  6. Step 6: Final answer
    x = 79,170.40

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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.