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Finding the Fourth Proportional to 70,611.48, 97,433.28 and 40,392

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Solution

The fourth proportional to 70,611.48, 97,433.28 and 40,392 is: 55,734.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,611.48 : 97,433.28 = 40,392 : x
  2. Step 2: Convert to fraction form
    70,611.48/97,433.28 = 40,392/x
  3. Step 3: Cross multiply
    70,611.48x = 97,433.28 × 40,392
  4. Step 4: Simplify right side
    70,611.48x = 3,935,525,045.76
  5. Step 5: Solve for x
    x = 3,935,525,045.76/70,611.48
  6. Step 6: Final answer
    x = 55,734.92

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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.