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Finding the Fourth Proportional to 48,686.40, 73,029.60 and 42,125.40

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Solution

The fourth proportional to 48,686.40, 73,029.60 and 42,125.40 is: 63,188.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,686.40 : 73,029.60 = 42,125.40 : x
  2. Step 2: Convert to fraction form
    48,686.40/73,029.60 = 42,125.40/x
  3. Step 3: Cross multiply
    48,686.40x = 73,029.60 × 42,125.40
  4. Step 4: Simplify right side
    48,686.40x = 3,076,401,111.84
  5. Step 5: Solve for x
    x = 3,076,401,111.84/48,686.40
  6. Step 6: Final answer
    x = 63,188.10

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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.