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Finding the Fourth Proportional to 70,219.95, 105,280.71 and 25,840.94

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Solution

The fourth proportional to 70,219.95, 105,280.71 and 25,840.94 is: 38,743.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,219.95 : 105,280.71 = 25,840.94 : x
  2. Step 2: Convert to fraction form
    70,219.95/105,280.71 = 25,840.94/x
  3. Step 3: Cross multiply
    70,219.95x = 105,280.71 × 25,840.94
  4. Step 4: Simplify right side
    70,219.95x = 2,720,551,983.86
  5. Step 5: Solve for x
    x = 2,720,551,983.86/70,219.95
  6. Step 6: Final answer
    x = 38,743.29

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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.