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Finding the Fourth Proportional to 72,898.90, 100,588.30 and 40,626.47

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Solution

The fourth proportional to 72,898.90, 100,588.30 and 40,626.47 is: 56,057.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,898.90 : 100,588.30 = 40,626.47 : x
  2. Step 2: Convert to fraction form
    72,898.90/100,588.30 = 40,626.47/x
  3. Step 3: Cross multiply
    72,898.90x = 100,588.30 × 40,626.47
  4. Step 4: Simplify right side
    72,898.90x = 4,086,547,552.30
  5. Step 5: Solve for x
    x = 4,086,547,552.30/72,898.90
  6. Step 6: Final answer
    x = 56,057.74

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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.