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Finding the Fourth Proportional to 70,380, 97,127.28 and 40,572

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Solution

The fourth proportional to 70,380, 97,127.28 and 40,572 is: 55,991.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,380 : 97,127.28 = 40,572 : x
  2. Step 2: Convert to fraction form
    70,380/97,127.28 = 40,572/x
  3. Step 3: Cross multiply
    70,380x = 97,127.28 × 40,572
  4. Step 4: Simplify right side
    70,380x = 3,940,648,004.16
  5. Step 5: Solve for x
    x = 3,940,648,004.16/70,380
  6. Step 6: Final answer
    x = 55,991.02

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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.