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Finding the Fourth Proportional to 71,083.42, 97,978.16 and 50,393.79

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Solution

The fourth proportional to 71,083.42, 97,978.16 and 50,393.79 is: 69,460.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,083.42 : 97,978.16 = 50,393.79 : x
  2. Step 2: Convert to fraction form
    71,083.42/97,978.16 = 50,393.79/x
  3. Step 3: Cross multiply
    71,083.42x = 97,978.16 × 50,393.79
  4. Step 4: Simplify right side
    71,083.42x = 4,937,490,945.61
  5. Step 5: Solve for x
    x = 4,937,490,945.61/71,083.42
  6. Step 6: Final answer
    x = 69,460.52

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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.