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Finding the Fourth Proportional to 103,593.72, 142,907.58 and 65,400.60

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Solution

The fourth proportional to 103,593.72, 142,907.58 and 65,400.60 is: 90,220.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,593.72 : 142,907.58 = 65,400.60 : x
  2. Step 2: Convert to fraction form
    103,593.72/142,907.58 = 65,400.60/x
  3. Step 3: Cross multiply
    103,593.72x = 142,907.58 × 65,400.60
  4. Step 4: Simplify right side
    103,593.72x = 9,346,241,476.55
  5. Step 5: Solve for x
    x = 9,346,241,476.55/103,593.72
  6. Step 6: Final answer
    x = 90,220.16

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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.