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Finding the Fourth Proportional to 86,836.34, 130,020.30 and 56,776.02

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Solution

The fourth proportional to 86,836.34, 130,020.30 and 56,776.02 is: 85,010.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,836.34 : 130,020.30 = 56,776.02 : x
  2. Step 2: Convert to fraction form
    86,836.34/130,020.30 = 56,776.02/x
  3. Step 3: Cross multiply
    86,836.34x = 130,020.30 × 56,776.02
  4. Step 4: Simplify right side
    86,836.34x = 7,382,035,153.21
  5. Step 5: Solve for x
    x = 7,382,035,153.21/86,836.34
  6. Step 6: Final answer
    x = 85,010.90

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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.