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Finding the Fourth Proportional to 86,891.50, 130,089.30 and 57,218.86

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Solution

The fourth proportional to 86,891.50, 130,089.30 and 57,218.86 is: 85,665.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,891.50 : 130,089.30 = 57,218.86 : x
  2. Step 2: Convert to fraction form
    86,891.50/130,089.30 = 57,218.86/x
  3. Step 3: Cross multiply
    86,891.50x = 130,089.30 × 57,218.86
  4. Step 4: Simplify right side
    86,891.50x = 7,443,561,444.20
  5. Step 5: Solve for x
    x = 7,443,561,444.20/86,891.50
  6. Step 6: Final answer
    x = 85,665.01

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1.5x scale

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.