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Finding the Fourth Proportional to 116,390.81, 174,450.81 and 66,505.88

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Solution

The fourth proportional to 116,390.81, 174,450.81 and 66,505.88 is: 99,681.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,390.81 : 174,450.81 = 66,505.88 : x
  2. Step 2: Convert to fraction form
    116,390.81/174,450.81 = 66,505.88/x
  3. Step 3: Cross multiply
    116,390.81x = 174,450.81 × 66,505.88
  4. Step 4: Simplify right side
    116,390.81x = 11,602,004,635.76
  5. Step 5: Solve for x
    x = 11,602,004,635.76/116,390.81
  6. Step 6: Final answer
    x = 99,681.45

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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.