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Finding the Fourth Proportional to 70,201.60, 105,532.80 and 66,054.40

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Solution

The fourth proportional to 70,201.60, 105,532.80 and 66,054.40 is: 99,298.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,201.60 : 105,532.80 = 66,054.40 : x
  2. Step 2: Convert to fraction form
    70,201.60/105,532.80 = 66,054.40/x
  3. Step 3: Cross multiply
    70,201.60x = 105,532.80 × 66,054.40
  4. Step 4: Simplify right side
    70,201.60x = 6,970,905,784.32
  5. Step 5: Solve for x
    x = 6,970,905,784.32/70,201.60
  6. Step 6: Final answer
    x = 99,298.39

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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.