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Finding the Fourth Proportional to 74,759.80, 112,139.70 and 47,111.80

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Solution

The fourth proportional to 74,759.80, 112,139.70 and 47,111.80 is: 70,667.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,759.80 : 112,139.70 = 47,111.80 : x
  2. Step 2: Convert to fraction form
    74,759.80/112,139.70 = 47,111.80/x
  3. Step 3: Cross multiply
    74,759.80x = 112,139.70 × 47,111.80
  4. Step 4: Simplify right side
    74,759.80x = 5,283,103,118.46
  5. Step 5: Solve for x
    x = 5,283,103,118.46/74,759.80
  6. Step 6: Final answer
    x = 70,667.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.