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Finding the Fourth Proportional to 53,307.81, 79,553.73 and 47,621.63

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Solution

The fourth proportional to 53,307.81, 79,553.73 and 47,621.63 is: 71,067.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,307.81 : 79,553.73 = 47,621.63 : x
  2. Step 2: Convert to fraction form
    53,307.81/79,553.73 = 47,621.63/x
  3. Step 3: Cross multiply
    53,307.81x = 79,553.73 × 47,621.63
  4. Step 4: Simplify right side
    53,307.81x = 3,788,478,181.03
  5. Step 5: Solve for x
    x = 3,788,478,181.03/53,307.81
  6. Step 6: Final answer
    x = 71,067.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.