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Finding the Fourth Proportional to 139,566.96, 209,376.40 and 64,637.60

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Solution

The fourth proportional to 139,566.96, 209,376.40 and 64,637.60 is: 96,968.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,566.96 : 209,376.40 = 64,637.60 : x
  2. Step 2: Convert to fraction form
    139,566.96/209,376.40 = 64,637.60/x
  3. Step 3: Cross multiply
    139,566.96x = 209,376.40 × 64,637.60
  4. Step 4: Simplify right side
    139,566.96x = 13,533,587,992.64
  5. Step 5: Solve for x
    x = 13,533,587,992.64/139,566.96
  6. Step 6: Final answer
    x = 96,968.42

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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.