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Finding the Fourth Proportional to 109,743.60, 164,615.40 and 65,420.40

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Solution

The fourth proportional to 109,743.60, 164,615.40 and 65,420.40 is: 98,130.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,743.60 : 164,615.40 = 65,420.40 : x
  2. Step 2: Convert to fraction form
    109,743.60/164,615.40 = 65,420.40/x
  3. Step 3: Cross multiply
    109,743.60x = 164,615.40 × 65,420.40
  4. Step 4: Simplify right side
    109,743.60x = 10,769,205,314.16
  5. Step 5: Solve for x
    x = 10,769,205,314.16/109,743.60
  6. Step 6: Final answer
    x = 98,130.60

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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.