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Finding the Fourth Proportional to 70,080.24, 105,116.04 and 28,526.16

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Solution

The fourth proportional to 70,080.24, 105,116.04 and 28,526.16 is: 42,787.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,080.24 : 105,116.04 = 28,526.16 : x
  2. Step 2: Convert to fraction form
    70,080.24/105,116.04 = 28,526.16/x
  3. Step 3: Cross multiply
    70,080.24x = 105,116.04 × 28,526.16
  4. Step 4: Simplify right side
    70,080.24x = 2,998,556,975.61
  5. Step 5: Solve for x
    x = 2,998,556,975.61/70,080.24
  6. Step 6: Final answer
    x = 42,787.48

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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.