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Finding the Fourth Proportional to 145,425.93, 200,666.13 and 81,751.43

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Solution

The fourth proportional to 145,425.93, 200,666.13 and 81,751.43 is: 112,804.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,425.93 : 200,666.13 = 81,751.43 : x
  2. Step 2: Convert to fraction form
    145,425.93/200,666.13 = 81,751.43/x
  3. Step 3: Cross multiply
    145,425.93x = 200,666.13 × 81,751.43
  4. Step 4: Simplify right side
    145,425.93x = 16,404,742,836.19
  5. Step 5: Solve for x
    x = 16,404,742,836.19/145,425.93
  6. Step 6: Final answer
    x = 112,804.80

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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.