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Finding the Fourth Proportional to 53,159.70, 79,666.65 and 43,318.20

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Solution

The fourth proportional to 53,159.70, 79,666.65 and 43,318.20 is: 64,917.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,159.70 : 79,666.65 = 43,318.20 : x
  2. Step 2: Convert to fraction form
    53,159.70/79,666.65 = 43,318.20/x
  3. Step 3: Cross multiply
    53,159.70x = 79,666.65 × 43,318.20
  4. Step 4: Simplify right side
    53,159.70x = 3,451,015,878.03
  5. Step 5: Solve for x
    x = 3,451,015,878.03/53,159.70
  6. Step 6: Final answer
    x = 64,917.90

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1.5x scale

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.