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Finding the Fourth Proportional to 72,898.51, 99,943.84 and 71,569.90

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Solution

The fourth proportional to 72,898.51, 99,943.84 and 71,569.90 is: 98,122.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,898.51 : 99,943.84 = 71,569.90 : x
  2. Step 2: Convert to fraction form
    72,898.51/99,943.84 = 71,569.90/x
  3. Step 3: Cross multiply
    72,898.51x = 99,943.84 × 71,569.90
  4. Step 4: Simplify right side
    72,898.51x = 7,152,971,152.66
  5. Step 5: Solve for x
    x = 7,152,971,152.66/72,898.51
  6. Step 6: Final answer
    x = 98,122.33

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.