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Finding the Fourth Proportional to 73,509, 101,442.78 and 39,975

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Solution

The fourth proportional to 73,509, 101,442.78 and 39,975 is: 55,165.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,509 : 101,442.78 = 39,975 : x
  2. Step 2: Convert to fraction form
    73,509/101,442.78 = 39,975/x
  3. Step 3: Cross multiply
    73,509x = 101,442.78 × 39,975
  4. Step 4: Simplify right side
    73,509x = 4,055,175,130.50
  5. Step 5: Solve for x
    x = 4,055,175,130.50/73,509
  6. Step 6: Final answer
    x = 55,165.70

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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.