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Finding the Fourth Proportional to 79,943, 119,914.50 and 21,575

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Solution

The fourth proportional to 79,943, 119,914.50 and 21,575 is: 32,362.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,943 : 119,914.50 = 21,575 : x
  2. Step 2: Convert to fraction form
    79,943/119,914.50 = 21,575/x
  3. Step 3: Cross multiply
    79,943x = 119,914.50 × 21,575
  4. Step 4: Simplify right side
    79,943x = 2,587,155,337.50
  5. Step 5: Solve for x
    x = 2,587,155,337.50/79,943
  6. Step 6: Final answer
    x = 32,362.50

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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.