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Finding the Fourth Proportional to 205,005.60, 307,551.60 and 64,778.40

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Solution

The fourth proportional to 205,005.60, 307,551.60 and 64,778.40 is: 97,181.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,005.60 : 307,551.60 = 64,778.40 : x
  2. Step 2: Convert to fraction form
    205,005.60/307,551.60 = 64,778.40/x
  3. Step 3: Cross multiply
    205,005.60x = 307,551.60 × 64,778.40
  4. Step 4: Simplify right side
    205,005.60x = 19,922,700,565.44
  5. Step 5: Solve for x
    x = 19,922,700,565.44/205,005.60
  6. Step 6: Final answer
    x = 97,181.25

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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.