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Finding the Fourth Proportional to 78,294.99, 117,420.89 and 22,130.67

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Solution

The fourth proportional to 78,294.99, 117,420.89 and 22,130.67 is: 33,189.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,294.99 : 117,420.89 = 22,130.67 : x
  2. Step 2: Convert to fraction form
    78,294.99/117,420.89 = 22,130.67/x
  3. Step 3: Cross multiply
    78,294.99x = 117,420.89 × 22,130.67
  4. Step 4: Simplify right side
    78,294.99x = 2,598,602,857.04
  5. Step 5: Solve for x
    x = 2,598,602,857.04/78,294.99
  6. Step 6: Final answer
    x = 33,189.90

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1.5x scale

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.