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Finding the Fourth Proportional to 39,741.60, 59,619.60 and 19,970.40

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Solution

The fourth proportional to 39,741.60, 59,619.60 and 19,970.40 is: 29,959.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,741.60 : 59,619.60 = 19,970.40 : x
  2. Step 2: Convert to fraction form
    39,741.60/59,619.60 = 19,970.40/x
  3. Step 3: Cross multiply
    39,741.60x = 59,619.60 × 19,970.40
  4. Step 4: Simplify right side
    39,741.60x = 1,190,627,259.84
  5. Step 5: Solve for x
    x = 1,190,627,259.84/39,741.60
  6. Step 6: Final answer
    x = 29,959.22

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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.