Home / 137,455.52-189,685.40-80,870.54

Finding the Fourth Proportional to 137,455.52, 189,685.40 and 80,870.54

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Solution

The fourth proportional to 137,455.52, 189,685.40 and 80,870.54 is: 111,599.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,455.52 : 189,685.40 = 80,870.54 : x
  2. Step 2: Convert to fraction form
    137,455.52/189,685.40 = 80,870.54/x
  3. Step 3: Cross multiply
    137,455.52x = 189,685.40 × 80,870.54
  4. Step 4: Simplify right side
    137,455.52x = 15,339,960,728.12
  5. Step 5: Solve for x
    x = 15,339,960,728.12/137,455.52
  6. Step 6: Final answer
    x = 111,599.45

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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.