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Finding the Third Proportional to 42,368 and 56,220

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Solution

The third proportional to 42,368 and 56,220 is: 74,600.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,368 : 56,220 = 56,220 : x
  2. Step 2: Convert to fraction form
    42,368/56,220 = 56,220/x
  3. Step 3: Cross multiply
    42,368x = 56,220 × 56,220
  4. Step 4: Simplify right side
    42,368x = 3,160,688,400
  5. Step 5: Solve for x
    x = 3,160,688,400/42,368
  6. Step 6: Final answer
    x = 74,600.84

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.