Home / 128,709.53-193,061.50-35,215.28

Finding the Fourth Proportional to 128,709.53, 193,061.50 and 35,215.28

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Solution

The fourth proportional to 128,709.53, 193,061.50 and 35,215.28 is: 52,822.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,709.53 : 193,061.50 = 35,215.28 : x
  2. Step 2: Convert to fraction form
    128,709.53/193,061.50 = 35,215.28/x
  3. Step 3: Cross multiply
    128,709.53x = 193,061.50 × 35,215.28
  4. Step 4: Simplify right side
    128,709.53x = 6,798,714,779.72
  5. Step 5: Solve for x
    x = 6,798,714,779.72/128,709.53
  6. Step 6: Final answer
    x = 52,822.16

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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.