Home / 128,851.04-177,814.09-72,263.63

Finding the Fourth Proportional to 128,851.04, 177,814.09 and 72,263.63

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Solution

The fourth proportional to 128,851.04, 177,814.09 and 72,263.63 is: 99,723.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,851.04 : 177,814.09 = 72,263.63 : x
  2. Step 2: Convert to fraction form
    128,851.04/177,814.09 = 72,263.63/x
  3. Step 3: Cross multiply
    128,851.04x = 177,814.09 × 72,263.63
  4. Step 4: Simplify right side
    128,851.04x = 12,849,491,608.55
  5. Step 5: Solve for x
    x = 12,849,491,608.55/128,851.04
  6. Step 6: Final answer
    x = 99,723.62

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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.