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Finding the Fourth Proportional to 78,603.48, 117,861.12 and 69,264.72

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Solution

The fourth proportional to 78,603.48, 117,861.12 and 69,264.72 is: 103,858.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,603.48 : 117,861.12 = 69,264.72 : x
  2. Step 2: Convert to fraction form
    78,603.48/117,861.12 = 69,264.72/x
  3. Step 3: Cross multiply
    78,603.48x = 117,861.12 × 69,264.72
  4. Step 4: Simplify right side
    78,603.48x = 8,163,617,475.69
  5. Step 5: Solve for x
    x = 8,163,617,475.69/78,603.48
  6. Step 6: Final answer
    x = 103,858.22

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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.