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Finding the Fourth Proportional to 63,459.92, 87,341.64 and 54,405.74

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Solution

The fourth proportional to 63,459.92, 87,341.64 and 54,405.74 is: 74,880.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,459.92 : 87,341.64 = 54,405.74 : x
  2. Step 2: Convert to fraction form
    63,459.92/87,341.64 = 54,405.74/x
  3. Step 3: Cross multiply
    63,459.92x = 87,341.64 × 54,405.74
  4. Step 4: Simplify right side
    63,459.92x = 4,751,886,557.01
  5. Step 5: Solve for x
    x = 4,751,886,557.01/63,459.92
  6. Step 6: Final answer
    x = 74,880.12

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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.