Home / 86,907.30-130,458.15-81,196.80

Finding the Fourth Proportional to 86,907.30, 130,458.15 and 81,196.80

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Solution

The fourth proportional to 86,907.30, 130,458.15 and 81,196.80 is: 121,886.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,907.30 : 130,458.15 = 81,196.80 : x
  2. Step 2: Convert to fraction form
    86,907.30/130,458.15 = 81,196.80/x
  3. Step 3: Cross multiply
    86,907.30x = 130,458.15 × 81,196.80
  4. Step 4: Simplify right side
    86,907.30x = 10,592,784,313.92
  5. Step 5: Solve for x
    x = 10,592,784,313.92/86,907.30
  6. Step 6: Final answer
    x = 121,886.01

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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.