Home / 156,921.03-235,439.87-72,721.53

Finding the Fourth Proportional to 156,921.03, 235,439.87 and 72,721.53

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Solution

The fourth proportional to 156,921.03, 235,439.87 and 72,721.53 is: 109,109.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,921.03 : 235,439.87 = 72,721.53 : x
  2. Step 2: Convert to fraction form
    156,921.03/235,439.87 = 72,721.53/x
  3. Step 3: Cross multiply
    156,921.03x = 235,439.87 × 72,721.53
  4. Step 4: Simplify right side
    156,921.03x = 17,121,547,205.79
  5. Step 5: Solve for x
    x = 17,121,547,205.79/156,921.03
  6. Step 6: Final answer
    x = 109,109.32

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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.