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Finding the Fourth Proportional to 85,908.64, 118,547.90 and 49,611.72

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Solution

The fourth proportional to 85,908.64, 118,547.90 and 49,611.72 is: 68,460.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,908.64 : 118,547.90 = 49,611.72 : x
  2. Step 2: Convert to fraction form
    85,908.64/118,547.90 = 49,611.72/x
  3. Step 3: Cross multiply
    85,908.64x = 118,547.90 × 49,611.72
  4. Step 4: Simplify right side
    85,908.64x = 5,881,365,221.39
  5. Step 5: Solve for x
    x = 5,881,365,221.39/85,908.64
  6. Step 6: Final answer
    x = 68,460.70

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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.