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Finding the Fourth Proportional to 55,688.40, 83,435.40 and 47,912.40

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Solution

The fourth proportional to 55,688.40, 83,435.40 and 47,912.40 is: 71,784.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,688.40 : 83,435.40 = 47,912.40 : x
  2. Step 2: Convert to fraction form
    55,688.40/83,435.40 = 47,912.40/x
  3. Step 3: Cross multiply
    55,688.40x = 83,435.40 × 47,912.40
  4. Step 4: Simplify right side
    55,688.40x = 3,997,590,258.96
  5. Step 5: Solve for x
    x = 3,997,590,258.96/55,688.40
  6. Step 6: Final answer
    x = 71,784.97

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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.