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Finding the Fourth Proportional to 70,913.40, 97,833.06 and 40,687.80

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Solution

The fourth proportional to 70,913.40, 97,833.06 and 40,687.80 is: 56,133.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,913.40 : 97,833.06 = 40,687.80 : x
  2. Step 2: Convert to fraction form
    70,913.40/97,833.06 = 40,687.80/x
  3. Step 3: Cross multiply
    70,913.40x = 97,833.06 × 40,687.80
  4. Step 4: Simplify right side
    70,913.40x = 3,980,611,978.67
  5. Step 5: Solve for x
    x = 3,980,611,978.67/70,913.40
  6. Step 6: Final answer
    x = 56,133.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.