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Finding the Fourth Proportional to 256,063.60, 384,210.60 and 89,970.80

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Solution

The fourth proportional to 256,063.60, 384,210.60 and 89,970.80 is: 134,996.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,063.60 : 384,210.60 = 89,970.80 : x
  2. Step 2: Convert to fraction form
    256,063.60/384,210.60 = 89,970.80/x
  3. Step 3: Cross multiply
    256,063.60x = 384,210.60 × 89,970.80
  4. Step 4: Simplify right side
    256,063.60x = 34,567,735,050.48
  5. Step 5: Solve for x
    x = 34,567,735,050.48/256,063.60
  6. Step 6: Final answer
    x = 134,996.68

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1.5x scale

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.