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Finding the Fourth Proportional to 153,400.40, 211,692.12 and 86,332.40

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Solution

The fourth proportional to 153,400.40, 211,692.12 and 86,332.40 is: 119,138.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,400.40 : 211,692.12 = 86,332.40 : x
  2. Step 2: Convert to fraction form
    153,400.40/211,692.12 = 86,332.40/x
  3. Step 3: Cross multiply
    153,400.40x = 211,692.12 × 86,332.40
  4. Step 4: Simplify right side
    153,400.40x = 18,275,888,780.69
  5. Step 5: Solve for x
    x = 18,275,888,780.69/153,400.40
  6. Step 6: Final answer
    x = 119,138.47

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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.