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Finding the Fourth Proportional to 91,314, 126,018.18 and 53,600.40

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Solution

The fourth proportional to 91,314, 126,018.18 and 53,600.40 is: 73,971.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,314 : 126,018.18 = 53,600.40 : x
  2. Step 2: Convert to fraction form
    91,314/126,018.18 = 53,600.40/x
  3. Step 3: Cross multiply
    91,314x = 126,018.18 × 53,600.40
  4. Step 4: Simplify right side
    91,314x = 6,754,624,855.27
  5. Step 5: Solve for x
    x = 6,754,624,855.27/91,314
  6. Step 6: Final answer
    x = 73,971.40

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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.