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Finding the Fourth Proportional to 91,722.40, 137,583.60 and 54,858.40

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Solution

The fourth proportional to 91,722.40, 137,583.60 and 54,858.40 is: 82,287.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,722.40 : 137,583.60 = 54,858.40 : x
  2. Step 2: Convert to fraction form
    91,722.40/137,583.60 = 54,858.40/x
  3. Step 3: Cross multiply
    91,722.40x = 137,583.60 × 54,858.40
  4. Step 4: Simplify right side
    91,722.40x = 7,547,616,162.24
  5. Step 5: Solve for x
    x = 7,547,616,162.24/91,722.40
  6. Step 6: Final answer
    x = 82,287.60

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1.5x scale

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.