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Finding the Fourth Proportional to 72,838.92, 100,545.92 and 56,928.49

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Solution

The fourth proportional to 72,838.92, 100,545.92 and 56,928.49 is: 78,583.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,838.92 : 100,545.92 = 56,928.49 : x
  2. Step 2: Convert to fraction form
    72,838.92/100,545.92 = 56,928.49/x
  3. Step 3: Cross multiply
    72,838.92x = 100,545.92 × 56,928.49
  4. Step 4: Simplify right side
    72,838.92x = 5,723,927,401.26
  5. Step 5: Solve for x
    x = 5,723,927,401.26/72,838.92
  6. Step 6: Final answer
    x = 78,583.36

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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.