Home / 128,001.80-192,002.70-86,011.40

Finding the Fourth Proportional to 128,001.80, 192,002.70 and 86,011.40

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Solution

The fourth proportional to 128,001.80, 192,002.70 and 86,011.40 is: 129,017.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,001.80 : 192,002.70 = 86,011.40 : x
  2. Step 2: Convert to fraction form
    128,001.80/192,002.70 = 86,011.40/x
  3. Step 3: Cross multiply
    128,001.80x = 192,002.70 × 86,011.40
  4. Step 4: Simplify right side
    128,001.80x = 16,514,421,030.78
  5. Step 5: Solve for x
    x = 16,514,421,030.78/128,001.80
  6. Step 6: Final answer
    x = 129,017.10

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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.