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Finding the Fourth Proportional to 67,347, 92,890.80 and 57,205.08

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Solution

The fourth proportional to 67,347, 92,890.80 and 57,205.08 is: 78,902.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,347 : 92,890.80 = 57,205.08 : x
  2. Step 2: Convert to fraction form
    67,347/92,890.80 = 57,205.08/x
  3. Step 3: Cross multiply
    67,347x = 92,890.80 × 57,205.08
  4. Step 4: Simplify right side
    67,347x = 5,313,825,645.26
  5. Step 5: Solve for x
    x = 5,313,825,645.26/67,347
  6. Step 6: Final answer
    x = 78,902.19

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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.