Home / 128,924.84-193,387-72,739.45

Finding the Fourth Proportional to 128,924.84, 193,387 and 72,739.45

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Solution

The fourth proportional to 128,924.84, 193,387 and 72,739.45 is: 109,109.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,924.84 : 193,387 = 72,739.45 : x
  2. Step 2: Convert to fraction form
    128,924.84/193,387 = 72,739.45/x
  3. Step 3: Cross multiply
    128,924.84x = 193,387 × 72,739.45
  4. Step 4: Simplify right side
    128,924.84x = 14,066,864,017.15
  5. Step 5: Solve for x
    x = 14,066,864,017.15/128,924.84
  6. Step 6: Final answer
    x = 109,109.03

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1.5x scale

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.