Home / 103,389.64-142,660.92-64,622.88

Finding the Fourth Proportional to 103,389.64, 142,660.92 and 64,622.88

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Solution

The fourth proportional to 103,389.64, 142,660.92 and 64,622.88 is: 89,169.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,389.64 : 142,660.92 = 64,622.88 : x
  2. Step 2: Convert to fraction form
    103,389.64/142,660.92 = 64,622.88/x
  3. Step 3: Cross multiply
    103,389.64x = 142,660.92 × 64,622.88
  4. Step 4: Simplify right side
    103,389.64x = 9,219,159,756.19
  5. Step 5: Solve for x
    x = 9,219,159,756.19/103,389.64
  6. Step 6: Final answer
    x = 89,169.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.