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Finding the Fourth Proportional to 74,567.64, 111,812.85 and 21,970.20

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Solution

The fourth proportional to 74,567.64, 111,812.85 and 21,970.20 is: 32,943.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,567.64 : 111,812.85 = 21,970.20 : x
  2. Step 2: Convert to fraction form
    74,567.64/111,812.85 = 21,970.20/x
  3. Step 3: Cross multiply
    74,567.64x = 111,812.85 × 21,970.20
  4. Step 4: Simplify right side
    74,567.64x = 2,456,550,677.07
  5. Step 5: Solve for x
    x = 2,456,550,677.07/74,567.64
  6. Step 6: Final answer
    x = 32,943.92

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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.