Home / 128,698.01-177,603.14-72,109.79

Finding the Fourth Proportional to 128,698.01, 177,603.14 and 72,109.79

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Solution

The fourth proportional to 128,698.01, 177,603.14 and 72,109.79 is: 99,511.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,698.01 : 177,603.14 = 72,109.79 : x
  2. Step 2: Convert to fraction form
    128,698.01/177,603.14 = 72,109.79/x
  3. Step 3: Cross multiply
    128,698.01x = 177,603.14 × 72,109.79
  4. Step 4: Simplify right side
    128,698.01x = 12,806,924,768.19
  5. Step 5: Solve for x
    x = 12,806,924,768.19/128,698.01
  6. Step 6: Final answer
    x = 99,511.44

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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.