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Finding the Fourth Proportional to 70,812.40, 97,709.80 and 40,591.92

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Solution

The fourth proportional to 70,812.40, 97,709.80 and 40,591.92 is: 56,010.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,812.40 : 97,709.80 = 40,591.92 : x
  2. Step 2: Convert to fraction form
    70,812.40/97,709.80 = 40,591.92/x
  3. Step 3: Cross multiply
    70,812.40x = 97,709.80 × 40,591.92
  4. Step 4: Simplify right side
    70,812.40x = 3,966,228,384.82
  5. Step 5: Solve for x
    x = 3,966,228,384.82/70,812.40
  6. Step 6: Final answer
    x = 56,010.37

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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.