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Finding the Fourth Proportional to 70,056.60, 104,993.70 and 28,455

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Solution

The fourth proportional to 70,056.60, 104,993.70 and 28,455 is: 42,645.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,056.60 : 104,993.70 = 28,455 : x
  2. Step 2: Convert to fraction form
    70,056.60/104,993.70 = 28,455/x
  3. Step 3: Cross multiply
    70,056.60x = 104,993.70 × 28,455
  4. Step 4: Simplify right side
    70,056.60x = 2,987,595,733.50
  5. Step 5: Solve for x
    x = 2,987,595,733.50/70,056.60
  6. Step 6: Final answer
    x = 42,645.46

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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.