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Finding the Fourth Proportional to 70,398.47, 105,584.94 and 28,276.85

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Solution

The fourth proportional to 70,398.47, 105,584.94 and 28,276.85 is: 42,410.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,398.47 : 105,584.94 = 28,276.85 : x
  2. Step 2: Convert to fraction form
    70,398.47/105,584.94 = 28,276.85/x
  3. Step 3: Cross multiply
    70,398.47x = 105,584.94 × 28,276.85
  4. Step 4: Simplify right side
    70,398.47x = 2,985,609,510.64
  5. Step 5: Solve for x
    x = 2,985,609,510.64/70,398.47
  6. Step 6: Final answer
    x = 42,410.15

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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.