Home / 86,787.40-130,181.10-85,865.80

Finding the Fourth Proportional to 86,787.40, 130,181.10 and 85,865.80

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Solution

The fourth proportional to 86,787.40, 130,181.10 and 85,865.80 is: 128,798.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,787.40 : 130,181.10 = 85,865.80 : x
  2. Step 2: Convert to fraction form
    86,787.40/130,181.10 = 85,865.80/x
  3. Step 3: Cross multiply
    86,787.40x = 130,181.10 × 85,865.80
  4. Step 4: Simplify right side
    86,787.40x = 11,178,104,296.38
  5. Step 5: Solve for x
    x = 11,178,104,296.38/86,787.40
  6. Step 6: Final answer
    x = 128,798.70

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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.