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Finding the Fourth Proportional to 72,872.69, 109,309.05 and 56,256.98

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Solution

The fourth proportional to 72,872.69, 109,309.05 and 56,256.98 is: 84,385.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,872.69 : 109,309.05 = 56,256.98 : x
  2. Step 2: Convert to fraction form
    72,872.69/109,309.05 = 56,256.98/x
  3. Step 3: Cross multiply
    72,872.69x = 109,309.05 × 56,256.98
  4. Step 4: Simplify right side
    72,872.69x = 6,149,397,039.67
  5. Step 5: Solve for x
    x = 6,149,397,039.67/72,872.69
  6. Step 6: Final answer
    x = 84,385.48

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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.