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Finding the Fourth Proportional to 236,681.80, 355,025.84 and 78,910.30

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Solution

The fourth proportional to 236,681.80, 355,025.84 and 78,910.30 is: 118,366.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,681.80 : 355,025.84 = 78,910.30 : x
  2. Step 2: Convert to fraction form
    236,681.80/355,025.84 = 78,910.30/x
  3. Step 3: Cross multiply
    236,681.80x = 355,025.84 × 78,910.30
  4. Step 4: Simplify right side
    236,681.80x = 28,015,196,811.83
  5. Step 5: Solve for x
    x = 28,015,196,811.83/236,681.80
  6. Step 6: Final answer
    x = 118,366.50

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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.