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Finding the Fourth Proportional to 91,873.60, 137,810.40 and 71,137.60

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Solution

The fourth proportional to 91,873.60, 137,810.40 and 71,137.60 is: 106,706.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,873.60 : 137,810.40 = 71,137.60 : x
  2. Step 2: Convert to fraction form
    91,873.60/137,810.40 = 71,137.60/x
  3. Step 3: Cross multiply
    91,873.60x = 137,810.40 × 71,137.60
  4. Step 4: Simplify right side
    91,873.60x = 9,803,501,111.04
  5. Step 5: Solve for x
    x = 9,803,501,111.04/91,873.60
  6. Step 6: Final answer
    x = 106,706.40

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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.