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Finding the Fourth Proportional to 103,659.92, 143,051.70 and 57,720.21

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Solution

The fourth proportional to 103,659.92, 143,051.70 and 57,720.21 is: 79,654.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,659.92 : 143,051.70 = 57,720.21 : x
  2. Step 2: Convert to fraction form
    103,659.92/143,051.70 = 57,720.21/x
  3. Step 3: Cross multiply
    103,659.92x = 143,051.70 × 57,720.21
  4. Step 4: Simplify right side
    103,659.92x = 8,256,973,844.86
  5. Step 5: Solve for x
    x = 8,256,973,844.86/103,659.92
  6. Step 6: Final answer
    x = 79,654.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.