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Finding the Fourth Proportional to 212,159.79, 318,171.62 and 69,973.10

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Solution

The fourth proportional to 212,159.79, 318,171.62 and 69,973.10 is: 104,937.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,159.79 : 318,171.62 = 69,973.10 : x
  2. Step 2: Convert to fraction form
    212,159.79/318,171.62 = 69,973.10/x
  3. Step 3: Cross multiply
    212,159.79x = 318,171.62 × 69,973.10
  4. Step 4: Simplify right side
    212,159.79x = 22,263,454,957.21
  5. Step 5: Solve for x
    x = 22,263,454,957.21/212,159.79
  6. Step 6: Final answer
    x = 104,937.20

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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.