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Finding the Fourth Proportional to 55,641.40, 76,742.75 and 47,893.40

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Solution

The fourth proportional to 55,641.40, 76,742.75 and 47,893.40 is: 66,056.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,641.40 : 76,742.75 = 47,893.40 : x
  2. Step 2: Convert to fraction form
    55,641.40/76,742.75 = 47,893.40/x
  3. Step 3: Cross multiply
    55,641.40x = 76,742.75 × 47,893.40
  4. Step 4: Simplify right side
    55,641.40x = 3,675,471,210.95
  5. Step 5: Solve for x
    x = 3,675,471,210.95/55,641.40
  6. Step 6: Final answer
    x = 66,056.41

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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.