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Finding the Fourth Proportional to 103,659.15, 155,300.09 and 72,002.32

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Solution

The fourth proportional to 103,659.15, 155,300.09 and 72,002.32 is: 107,872.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,659.15 : 155,300.09 = 72,002.32 : x
  2. Step 2: Convert to fraction form
    103,659.15/155,300.09 = 72,002.32/x
  3. Step 3: Cross multiply
    103,659.15x = 155,300.09 × 72,002.32
  4. Step 4: Simplify right side
    103,659.15x = 11,181,966,776.21
  5. Step 5: Solve for x
    x = 11,181,966,776.21/103,659.15
  6. Step 6: Final answer
    x = 107,872.45

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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.