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Finding the Fourth Proportional to 72,570.90, 100,327.50 and 71,905.89

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Solution

The fourth proportional to 72,570.90, 100,327.50 and 71,905.89 is: 99,408.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,570.90 : 100,327.50 = 71,905.89 : x
  2. Step 2: Convert to fraction form
    72,570.90/100,327.50 = 71,905.89/x
  3. Step 3: Cross multiply
    72,570.90x = 100,327.50 × 71,905.89
  4. Step 4: Simplify right side
    72,570.90x = 7,214,138,178.98
  5. Step 5: Solve for x
    x = 7,214,138,178.98/72,570.90
  6. Step 6: Final answer
    x = 99,408.14

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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.