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Finding the Fourth Proportional to 7,166,457.72, 9,889,938.81 and 3,903,371.10

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Solution

The fourth proportional to 7,166,457.72, 9,889,938.81 and 3,903,371.10 is: 5,386,775.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,166,457.72 : 9,889,938.81 = 3,903,371.10 : x
  2. Step 2: Convert to fraction form
    7,166,457.72/9,889,938.81 = 3,903,371.10/x
  3. Step 3: Cross multiply
    7,166,457.72x = 9,889,938.81 × 3,903,371.10
  4. Step 4: Simplify right side
    7,166,457.72x = 38,604,101,331,722.39
  5. Step 5: Solve for x
    x = 38,604,101,331,722.39/7,166,457.72
  6. Step 6: Final answer
    x = 5,386,775.84

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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.