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Finding the Fourth Proportional to 72,011.77, 99,368.70 and 39,745.79

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Solution

The fourth proportional to 72,011.77, 99,368.70 and 39,745.79 is: 54,845.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,011.77 : 99,368.70 = 39,745.79 : x
  2. Step 2: Convert to fraction form
    72,011.77/99,368.70 = 39,745.79/x
  3. Step 3: Cross multiply
    72,011.77x = 99,368.70 × 39,745.79
  4. Step 4: Simplify right side
    72,011.77x = 3,949,487,731.19
  5. Step 5: Solve for x
    x = 3,949,487,731.19/72,011.77
  6. Step 6: Final answer
    x = 54,845.03

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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.