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Finding the Fourth Proportional to 78,173.64, 117,259.34 and 19,009.16

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Solution

The fourth proportional to 78,173.64, 117,259.34 and 19,009.16 is: 28,513.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,173.64 : 117,259.34 = 19,009.16 : x
  2. Step 2: Convert to fraction form
    78,173.64/117,259.34 = 19,009.16/x
  3. Step 3: Cross multiply
    78,173.64x = 117,259.34 × 19,009.16
  4. Step 4: Simplify right side
    78,173.64x = 2,229,001,555.55
  5. Step 5: Solve for x
    x = 2,229,001,555.55/78,173.64
  6. Step 6: Final answer
    x = 28,513.47

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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.