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Finding the Fourth Proportional to 64,290.72, 88,730.64 and 39,135.52

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Solution

The fourth proportional to 64,290.72, 88,730.64 and 39,135.52 is: 54,012.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,290.72 : 88,730.64 = 39,135.52 : x
  2. Step 2: Convert to fraction form
    64,290.72/88,730.64 = 39,135.52/x
  3. Step 3: Cross multiply
    64,290.72x = 88,730.64 × 39,135.52
  4. Step 4: Simplify right side
    64,290.72x = 3,472,519,736.33
  5. Step 5: Solve for x
    x = 3,472,519,736.33/64,290.72
  6. Step 6: Final answer
    x = 54,012.77

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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.