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Finding the Fourth Proportional to 72,006.64, 99,364.44 and 45,148

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Solution

The fourth proportional to 72,006.64, 99,364.44 and 45,148 is: 62,301.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,006.64 : 99,364.44 = 45,148 : x
  2. Step 2: Convert to fraction form
    72,006.64/99,364.44 = 45,148/x
  3. Step 3: Cross multiply
    72,006.64x = 99,364.44 × 45,148
  4. Step 4: Simplify right side
    72,006.64x = 4,486,105,737.12
  5. Step 5: Solve for x
    x = 4,486,105,737.12/72,006.64
  6. Step 6: Final answer
    x = 62,301.28

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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.