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Finding the Fourth Proportional to 145,491.57, 218,290.66 and 61,272.93

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Solution

The fourth proportional to 145,491.57, 218,290.66 and 61,272.93 is: 91,931.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,491.57 : 218,290.66 = 61,272.93 : x
  2. Step 2: Convert to fraction form
    145,491.57/218,290.66 = 61,272.93/x
  3. Step 3: Cross multiply
    145,491.57x = 218,290.66 × 61,272.93
  4. Step 4: Simplify right side
    145,491.57x = 13,375,308,176.65
  5. Step 5: Solve for x
    x = 13,375,308,176.65/145,491.57
  6. Step 6: Final answer
    x = 91,931.84

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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.