Home / 128,912.04-177,898.14-72,322.20

Finding the Fourth Proportional to 128,912.04, 177,898.14 and 72,322.20

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Solution

The fourth proportional to 128,912.04, 177,898.14 and 72,322.20 is: 99,804.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,912.04 : 177,898.14 = 72,322.20 : x
  2. Step 2: Convert to fraction form
    128,912.04/177,898.14 = 72,322.20/x
  3. Step 3: Cross multiply
    128,912.04x = 177,898.14 × 72,322.20
  4. Step 4: Simplify right side
    128,912.04x = 12,865,984,860.71
  5. Step 5: Solve for x
    x = 12,865,984,860.71/128,912.04
  6. Step 6: Final answer
    x = 99,804.37

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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.