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Finding the Fourth Proportional to 66,210.99, 91,391.18 and 45,002.54

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Solution

The fourth proportional to 66,210.99, 91,391.18 and 45,002.54 is: 62,117.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,210.99 : 91,391.18 = 45,002.54 : x
  2. Step 2: Convert to fraction form
    66,210.99/91,391.18 = 45,002.54/x
  3. Step 3: Cross multiply
    66,210.99x = 91,391.18 × 45,002.54
  4. Step 4: Simplify right side
    66,210.99x = 4,112,834,551.63
  5. Step 5: Solve for x
    x = 4,112,834,551.63/66,210.99
  6. Step 6: Final answer
    x = 62,117.10

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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.