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Finding the Fourth Proportional to 78,509.80, 117,616.09 and 46,392.85

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Solution

The fourth proportional to 78,509.80, 117,616.09 and 46,392.85 is: 69,501.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,509.80 : 117,616.09 = 46,392.85 : x
  2. Step 2: Convert to fraction form
    78,509.80/117,616.09 = 46,392.85/x
  3. Step 3: Cross multiply
    78,509.80x = 117,616.09 × 46,392.85
  4. Step 4: Simplify right side
    78,509.80x = 5,456,545,448.39
  5. Step 5: Solve for x
    x = 5,456,545,448.39/78,509.80
  6. Step 6: Final answer
    x = 69,501.46

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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.