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Finding the Fourth Proportional to 70,259.12, 105,388.68 and 28,706.12

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Solution

The fourth proportional to 70,259.12, 105,388.68 and 28,706.12 is: 43,059.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,259.12 : 105,388.68 = 28,706.12 : x
  2. Step 2: Convert to fraction form
    70,259.12/105,388.68 = 28,706.12/x
  3. Step 3: Cross multiply
    70,259.12x = 105,388.68 × 28,706.12
  4. Step 4: Simplify right side
    70,259.12x = 3,025,300,094.72
  5. Step 5: Solve for x
    x = 3,025,300,094.72/70,259.12
  6. Step 6: Final answer
    x = 43,059.18

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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.