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Finding the Fourth Proportional to 145,491.44, 218,290.47 and 61,272.81

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Solution

The fourth proportional to 145,491.44, 218,290.47 and 61,272.81 is: 91,931.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,491.44 : 218,290.47 = 61,272.81 : x
  2. Step 2: Convert to fraction form
    145,491.44/218,290.47 = 61,272.81/x
  3. Step 3: Cross multiply
    145,491.44x = 218,290.47 × 61,272.81
  4. Step 4: Simplify right side
    145,491.44x = 13,375,269,401.67
  5. Step 5: Solve for x
    x = 13,375,269,401.67/145,491.44
  6. Step 6: Final answer
    x = 91,931.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.