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Finding the Fourth Proportional to 71,485.29, 98,646.93 and 39,653.64

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Solution

The fourth proportional to 71,485.29, 98,646.93 and 39,653.64 is: 54,720.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,485.29 : 98,646.93 = 39,653.64 : x
  2. Step 2: Convert to fraction form
    71,485.29/98,646.93 = 39,653.64/x
  3. Step 3: Cross multiply
    71,485.29x = 98,646.93 × 39,653.64
  4. Step 4: Simplify right side
    71,485.29x = 3,911,709,849.33
  5. Step 5: Solve for x
    x = 3,911,709,849.33/71,485.29
  6. Step 6: Final answer
    x = 54,720.49

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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.