Home / 99,982.70-137,980.29-57,541.34

Finding the Fourth Proportional to 99,982.70, 137,980.29 and 57,541.34

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Solution

The fourth proportional to 99,982.70, 137,980.29 and 57,541.34 is: 79,409.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,982.70 : 137,980.29 = 57,541.34 : x
  2. Step 2: Convert to fraction form
    99,982.70/137,980.29 = 57,541.34/x
  3. Step 3: Cross multiply
    99,982.70x = 137,980.29 × 57,541.34
  4. Step 4: Simplify right side
    99,982.70x = 7,939,570,780.19
  5. Step 5: Solve for x
    x = 7,939,570,780.19/99,982.70
  6. Step 6: Final answer
    x = 79,409.45

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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.