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Finding the Fourth Proportional to 72,907.80, 100,612.75 and 39,373.80

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Solution

The fourth proportional to 72,907.80, 100,612.75 and 39,373.80 is: 54,335.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,907.80 : 100,612.75 = 39,373.80 : x
  2. Step 2: Convert to fraction form
    72,907.80/100,612.75 = 39,373.80/x
  3. Step 3: Cross multiply
    72,907.80x = 100,612.75 × 39,373.80
  4. Step 4: Simplify right side
    72,907.80x = 3,961,506,295.95
  5. Step 5: Solve for x
    x = 3,961,506,295.95/72,907.80
  6. Step 6: Final answer
    x = 54,335.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.