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Finding the Fourth Proportional to 93,705.60, 140,590.80 and 90,465.60

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Solution

The fourth proportional to 93,705.60, 140,590.80 and 90,465.60 is: 135,729.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,705.60 : 140,590.80 = 90,465.60 : x
  2. Step 2: Convert to fraction form
    93,705.60/140,590.80 = 90,465.60/x
  3. Step 3: Cross multiply
    93,705.60x = 140,590.80 × 90,465.60
  4. Step 4: Simplify right side
    93,705.60x = 12,718,631,076.48
  5. Step 5: Solve for x
    x = 12,718,631,076.48/93,705.60
  6. Step 6: Final answer
    x = 135,729.68

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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.