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Finding the Fourth Proportional to 139,637.63, 209,431.30 and 59,720.55

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Solution

The fourth proportional to 139,637.63, 209,431.30 and 59,720.55 is: 89,570.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,637.63 : 209,431.30 = 59,720.55 : x
  2. Step 2: Convert to fraction form
    139,637.63/209,431.30 = 59,720.55/x
  3. Step 3: Cross multiply
    139,637.63x = 209,431.30 × 59,720.55
  4. Step 4: Simplify right side
    139,637.63x = 12,507,352,905.12
  5. Step 5: Solve for x
    x = 12,507,352,905.12/139,637.63
  6. Step 6: Final answer
    x = 89,570.07

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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.