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Finding the Fourth Proportional to 65,973, 91,043.06 and 39,477

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Solution

The fourth proportional to 65,973, 91,043.06 and 39,477 is: 54,478.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,973 : 91,043.06 = 39,477 : x
  2. Step 2: Convert to fraction form
    65,973/91,043.06 = 39,477/x
  3. Step 3: Cross multiply
    65,973x = 91,043.06 × 39,477
  4. Step 4: Simplify right side
    65,973x = 3,594,106,879.62
  5. Step 5: Solve for x
    x = 3,594,106,879.62/65,973
  6. Step 6: Final answer
    x = 54,478.45

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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.