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Finding the Fourth Proportional to 66,296.40, 99,444.60 and 39,987.60

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Solution

The fourth proportional to 66,296.40, 99,444.60 and 39,987.60 is: 59,981.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,296.40 : 99,444.60 = 39,987.60 : x
  2. Step 2: Convert to fraction form
    66,296.40/99,444.60 = 39,987.60/x
  3. Step 3: Cross multiply
    66,296.40x = 99,444.60 × 39,987.60
  4. Step 4: Simplify right side
    66,296.40x = 3,976,550,886.96
  5. Step 5: Solve for x
    x = 3,976,550,886.96/66,296.40
  6. Step 6: Final answer
    x = 59,981.40

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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.