Home / 89,991.10-134,986.65-72,495.10

Finding the Fourth Proportional to 89,991.10, 134,986.65 and 72,495.10

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Solution

The fourth proportional to 89,991.10, 134,986.65 and 72,495.10 is: 108,742.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,991.10 : 134,986.65 = 72,495.10 : x
  2. Step 2: Convert to fraction form
    89,991.10/134,986.65 = 72,495.10/x
  3. Step 3: Cross multiply
    89,991.10x = 134,986.65 × 72,495.10
  4. Step 4: Simplify right side
    89,991.10x = 9,785,870,690.42
  5. Step 5: Solve for x
    x = 9,785,870,690.42/89,991.10
  6. Step 6: Final answer
    x = 108,742.65

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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.