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Finding the Fourth Proportional to 42,607.60, 63,911.40 and 38,460.40

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Solution

The fourth proportional to 42,607.60, 63,911.40 and 38,460.40 is: 57,690.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,607.60 : 63,911.40 = 38,460.40 : x
  2. Step 2: Convert to fraction form
    42,607.60/63,911.40 = 38,460.40/x
  3. Step 3: Cross multiply
    42,607.60x = 63,911.40 × 38,460.40
  4. Step 4: Simplify right side
    42,607.60x = 2,458,058,008.56
  5. Step 5: Solve for x
    x = 2,458,058,008.56/42,607.60
  6. Step 6: Final answer
    x = 57,690.60

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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.