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Finding the Fourth Proportional to 153,931.60, 230,928.60 and 87,403.60

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Solution

The fourth proportional to 153,931.60, 230,928.60 and 87,403.60 is: 131,123.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,931.60 : 230,928.60 = 87,403.60 : x
  2. Step 2: Convert to fraction form
    153,931.60/230,928.60 = 87,403.60/x
  3. Step 3: Cross multiply
    153,931.60x = 230,928.60 × 87,403.60
  4. Step 4: Simplify right side
    153,931.60x = 20,183,990,982.96
  5. Step 5: Solve for x
    x = 20,183,990,982.96/153,931.60
  6. Step 6: Final answer
    x = 131,123.12

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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.