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Finding the Fourth Proportional to 54,465.40, 81,698.10 and 47,904.40

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Solution

The fourth proportional to 54,465.40, 81,698.10 and 47,904.40 is: 71,856.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,465.40 : 81,698.10 = 47,904.40 : x
  2. Step 2: Convert to fraction form
    54,465.40/81,698.10 = 47,904.40/x
  3. Step 3: Cross multiply
    54,465.40x = 81,698.10 × 47,904.40
  4. Step 4: Simplify right side
    54,465.40x = 3,913,698,461.64
  5. Step 5: Solve for x
    x = 3,913,698,461.64/54,465.40
  6. Step 6: Final answer
    x = 71,856.60

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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.