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Finding the Fourth Proportional to 72,809.80, 109,128.30 and 37,731.40

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Solution

The fourth proportional to 72,809.80, 109,128.30 and 37,731.40 is: 56,552.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,809.80 : 109,128.30 = 37,731.40 : x
  2. Step 2: Convert to fraction form
    72,809.80/109,128.30 = 37,731.40/x
  3. Step 3: Cross multiply
    72,809.80x = 109,128.30 × 37,731.40
  4. Step 4: Simplify right side
    72,809.80x = 4,117,563,538.62
  5. Step 5: Solve for x
    x = 4,117,563,538.62/72,809.80
  6. Step 6: Final answer
    x = 56,552.33

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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.