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Finding the Fourth Proportional to 78,317.94, 117,476.91 and 19,152.91

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Solution

The fourth proportional to 78,317.94, 117,476.91 and 19,152.91 is: 28,729.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,317.94 : 117,476.91 = 19,152.91 : x
  2. Step 2: Convert to fraction form
    78,317.94/117,476.91 = 19,152.91/x
  3. Step 3: Cross multiply
    78,317.94x = 117,476.91 × 19,152.91
  4. Step 4: Simplify right side
    78,317.94x = 2,250,024,390.62
  5. Step 5: Solve for x
    x = 2,250,024,390.62/78,317.94
  6. Step 6: Final answer
    x = 28,729.36

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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.