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Finding the Fourth Proportional to 98,811.20, 148,216.80 and 84,814.40

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Solution

The fourth proportional to 98,811.20, 148,216.80 and 84,814.40 is: 127,221.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,811.20 : 148,216.80 = 84,814.40 : x
  2. Step 2: Convert to fraction form
    98,811.20/148,216.80 = 84,814.40/x
  3. Step 3: Cross multiply
    98,811.20x = 148,216.80 × 84,814.40
  4. Step 4: Simplify right side
    98,811.20x = 12,570,918,961.92
  5. Step 5: Solve for x
    x = 12,570,918,961.92/98,811.20
  6. Step 6: Final answer
    x = 127,221.60

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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.