Home / 86,280.78-129,277.56-30,089.90

Finding the Fourth Proportional to 86,280.78, 129,277.56 and 30,089.90

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Solution

The fourth proportional to 86,280.78, 129,277.56 and 30,089.90 is: 45,084.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,280.78 : 129,277.56 = 30,089.90 : x
  2. Step 2: Convert to fraction form
    86,280.78/129,277.56 = 30,089.90/x
  3. Step 3: Cross multiply
    86,280.78x = 129,277.56 × 30,089.90
  4. Step 4: Simplify right side
    86,280.78x = 3,889,948,852.64
  5. Step 5: Solve for x
    x = 3,889,948,852.64/86,280.78
  6. Step 6: Final answer
    x = 45,084.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.