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Finding the Fourth Proportional to 78,390.62, 117,603.57 and 25,798.22

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Solution

The fourth proportional to 78,390.62, 117,603.57 and 25,798.22 is: 38,703.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,390.62 : 117,603.57 = 25,798.22 : x
  2. Step 2: Convert to fraction form
    78,390.62/117,603.57 = 25,798.22/x
  3. Step 3: Cross multiply
    78,390.62x = 117,603.57 × 25,798.22
  4. Step 4: Simplify right side
    78,390.62x = 3,033,962,771.65
  5. Step 5: Solve for x
    x = 3,033,962,771.65/78,390.62
  6. Step 6: Final answer
    x = 38,703.14

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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.