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Finding the Fourth Proportional to 70,341.66, 105,478.47 and 25,989.30

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Solution

The fourth proportional to 70,341.66, 105,478.47 and 25,989.30 is: 38,971.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,341.66 : 105,478.47 = 25,989.30 : x
  2. Step 2: Convert to fraction form
    70,341.66/105,478.47 = 25,989.30/x
  3. Step 3: Cross multiply
    70,341.66x = 105,478.47 × 25,989.30
  4. Step 4: Simplify right side
    70,341.66x = 2,741,311,600.37
  5. Step 5: Solve for x
    x = 2,741,311,600.37/70,341.66
  6. Step 6: Final answer
    x = 38,971.38

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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.