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Finding the Fourth Proportional to 75,999.90, 113,999.85 and 48,006.30

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Solution

The fourth proportional to 75,999.90, 113,999.85 and 48,006.30 is: 72,009.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,999.90 : 113,999.85 = 48,006.30 : x
  2. Step 2: Convert to fraction form
    75,999.90/113,999.85 = 48,006.30/x
  3. Step 3: Cross multiply
    75,999.90x = 113,999.85 × 48,006.30
  4. Step 4: Simplify right side
    75,999.90x = 5,472,710,999.06
  5. Step 5: Solve for x
    x = 5,472,710,999.06/75,999.90
  6. Step 6: Final answer
    x = 72,009.45

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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.