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Finding the Fourth Proportional to 91,706.60, 137,430.30 and 56,541.80

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Solution

The fourth proportional to 91,706.60, 137,430.30 and 56,541.80 is: 84,732.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,706.60 : 137,430.30 = 56,541.80 : x
  2. Step 2: Convert to fraction form
    91,706.60/137,430.30 = 56,541.80/x
  3. Step 3: Cross multiply
    91,706.60x = 137,430.30 × 56,541.80
  4. Step 4: Simplify right side
    91,706.60x = 7,770,556,536.54
  5. Step 5: Solve for x
    x = 7,770,556,536.54/91,706.60
  6. Step 6: Final answer
    x = 84,732.79

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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.