Home / 103,691.28-155,303.52-72,665.04

Finding the Fourth Proportional to 103,691.28, 155,303.52 and 72,665.04

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Solution

The fourth proportional to 103,691.28, 155,303.52 and 72,665.04 is: 108,834.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,691.28 : 155,303.52 = 72,665.04 : x
  2. Step 2: Convert to fraction form
    103,691.28/155,303.52 = 72,665.04/x
  3. Step 3: Cross multiply
    103,691.28x = 155,303.52 × 72,665.04
  4. Step 4: Simplify right side
    103,691.28x = 11,285,136,492.94
  5. Step 5: Solve for x
    x = 11,285,136,492.94/103,691.28
  6. Step 6: Final answer
    x = 108,834.00

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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.