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Finding the Fourth Proportional to 70,432.94, 105,646.68 and 28,300.39

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Solution

The fourth proportional to 70,432.94, 105,646.68 and 28,300.39 is: 42,449.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,432.94 : 105,646.68 = 28,300.39 : x
  2. Step 2: Convert to fraction form
    70,432.94/105,646.68 = 28,300.39/x
  3. Step 3: Cross multiply
    70,432.94x = 105,646.68 × 28,300.39
  4. Step 4: Simplify right side
    70,432.94x = 2,989,841,982.09
  5. Step 5: Solve for x
    x = 2,989,841,982.09/70,432.94
  6. Step 6: Final answer
    x = 42,449.48

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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.