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Finding the Fourth Proportional to 145,679.73, 201,053.39 and 85,269.93

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Solution

The fourth proportional to 145,679.73, 201,053.39 and 85,269.93 is: 117,681.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,679.73 : 201,053.39 = 85,269.93 : x
  2. Step 2: Convert to fraction form
    145,679.73/201,053.39 = 85,269.93/x
  3. Step 3: Cross multiply
    145,679.73x = 201,053.39 × 85,269.93
  4. Step 4: Simplify right side
    145,679.73x = 17,143,808,065.21
  5. Step 5: Solve for x
    x = 17,143,808,065.21/145,679.73
  6. Step 6: Final answer
    x = 117,681.49

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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.