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Finding the Fourth Proportional to 42,770.56, 64,165.56 and 19,403.68

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Solution

The fourth proportional to 42,770.56, 64,165.56 and 19,403.68 is: 29,109.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,770.56 : 64,165.56 = 19,403.68 : x
  2. Step 2: Convert to fraction form
    42,770.56/64,165.56 = 19,403.68/x
  3. Step 3: Cross multiply
    42,770.56x = 64,165.56 × 19,403.68
  4. Step 4: Simplify right side
    42,770.56x = 1,245,047,993.26
  5. Step 5: Solve for x
    x = 1,245,047,993.26/42,770.56
  6. Step 6: Final answer
    x = 29,109.93

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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.