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Finding the Fourth Proportional to 72,810.84, 100,509.96 and 48,951.36

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Solution

The fourth proportional to 72,810.84, 100,509.96 and 48,951.36 is: 67,573.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,810.84 : 100,509.96 = 48,951.36 : x
  2. Step 2: Convert to fraction form
    72,810.84/100,509.96 = 48,951.36/x
  3. Step 3: Cross multiply
    72,810.84x = 100,509.96 × 48,951.36
  4. Step 4: Simplify right side
    72,810.84x = 4,920,099,235.55
  5. Step 5: Solve for x
    x = 4,920,099,235.55/72,810.84
  6. Step 6: Final answer
    x = 67,573.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.