Home / 128,897.40-193,346.10-76,279.80

Finding the Fourth Proportional to 128,897.40, 193,346.10 and 76,279.80

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Solution

The fourth proportional to 128,897.40, 193,346.10 and 76,279.80 is: 114,419.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,897.40 : 193,346.10 = 76,279.80 : x
  2. Step 2: Convert to fraction form
    128,897.40/193,346.10 = 76,279.80/x
  3. Step 3: Cross multiply
    128,897.40x = 193,346.10 × 76,279.80
  4. Step 4: Simplify right side
    128,897.40x = 14,748,401,838.78
  5. Step 5: Solve for x
    x = 14,748,401,838.78/128,897.40
  6. Step 6: Final answer
    x = 114,419.70

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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.