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Finding the Fourth Proportional to 78,349.64, 117,499.52 and 25,746.98

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Solution

The fourth proportional to 78,349.64, 117,499.52 and 25,746.98 is: 38,612.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,349.64 : 117,499.52 = 25,746.98 : x
  2. Step 2: Convert to fraction form
    78,349.64/117,499.52 = 25,746.98/x
  3. Step 3: Cross multiply
    78,349.64x = 117,499.52 × 25,746.98
  4. Step 4: Simplify right side
    78,349.64x = 3,025,257,791.45
  5. Step 5: Solve for x
    x = 3,025,257,791.45/78,349.64
  6. Step 6: Final answer
    x = 38,612.27

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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.