Home / 128,851.17-177,814.08-72,262.59

Finding the Fourth Proportional to 128,851.17, 177,814.08 and 72,262.59

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Solution

The fourth proportional to 128,851.17, 177,814.08 and 72,262.59 is: 99,722.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,851.17 : 177,814.08 = 72,262.59 : x
  2. Step 2: Convert to fraction form
    128,851.17/177,814.08 = 72,262.59/x
  3. Step 3: Cross multiply
    128,851.17x = 177,814.08 × 72,262.59
  4. Step 4: Simplify right side
    128,851.17x = 12,849,305,959.27
  5. Step 5: Solve for x
    x = 12,849,305,959.27/128,851.17
  6. Step 6: Final answer
    x = 99,722.07

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1.5x scale

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.