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Finding the Fourth Proportional to 93,619.40, 140,210.40 and 91,740.20

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Solution

The fourth proportional to 93,619.40, 140,210.40 and 91,740.20 is: 137,395.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,619.40 : 140,210.40 = 91,740.20 : x
  2. Step 2: Convert to fraction form
    93,619.40/140,210.40 = 91,740.20/x
  3. Step 3: Cross multiply
    93,619.40x = 140,210.40 × 91,740.20
  4. Step 4: Simplify right side
    93,619.40x = 12,862,930,138.08
  5. Step 5: Solve for x
    x = 12,862,930,138.08/93,619.40
  6. Step 6: Final answer
    x = 137,395.99

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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.