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Finding the Fourth Proportional to 71,428.86, 98,503.44 and 42,743.64

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Solution

The fourth proportional to 71,428.86, 98,503.44 and 42,743.64 is: 58,945.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,428.86 : 98,503.44 = 42,743.64 : x
  2. Step 2: Convert to fraction form
    71,428.86/98,503.44 = 42,743.64/x
  3. Step 3: Cross multiply
    71,428.86x = 98,503.44 × 42,743.64
  4. Step 4: Simplify right side
    71,428.86x = 4,210,395,578.12
  5. Step 5: Solve for x
    x = 4,210,395,578.12/71,428.86
  6. Step 6: Final answer
    x = 58,945.30

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1.5x scale

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.