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Finding the Fourth Proportional to 86,792.40, 130,156.20 and 30,610.80

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Solution

The fourth proportional to 86,792.40, 130,156.20 and 30,610.80 is: 45,904.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,792.40 : 130,156.20 = 30,610.80 : x
  2. Step 2: Convert to fraction form
    86,792.40/130,156.20 = 30,610.80/x
  3. Step 3: Cross multiply
    86,792.40x = 130,156.20 × 30,610.80
  4. Step 4: Simplify right side
    86,792.40x = 3,984,185,406.96
  5. Step 5: Solve for x
    x = 3,984,185,406.96/86,792.40
  6. Step 6: Final answer
    x = 45,904.77

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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.