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Finding the Fourth Proportional to 72,099.84, 99,497.19 and 39,834.45

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Solution

The fourth proportional to 72,099.84, 99,497.19 and 39,834.45 is: 54,971.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,099.84 : 99,497.19 = 39,834.45 : x
  2. Step 2: Convert to fraction form
    72,099.84/99,497.19 = 39,834.45/x
  3. Step 3: Cross multiply
    72,099.84x = 99,497.19 × 39,834.45
  4. Step 4: Simplify right side
    72,099.84x = 3,963,415,840.20
  5. Step 5: Solve for x
    x = 3,963,415,840.20/72,099.84
  6. Step 6: Final answer
    x = 54,971.22

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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.