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Finding the Fourth Proportional to 153,393.12, 211,696.80 and 89,726.88

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Solution

The fourth proportional to 153,393.12, 211,696.80 and 89,726.88 is: 123,831.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,393.12 : 211,696.80 = 89,726.88 : x
  2. Step 2: Convert to fraction form
    153,393.12/211,696.80 = 89,726.88/x
  3. Step 3: Cross multiply
    153,393.12x = 211,696.80 × 89,726.88
  4. Step 4: Simplify right side
    153,393.12x = 18,994,893,369.98
  5. Step 5: Solve for x
    x = 18,994,893,369.98/153,393.12
  6. Step 6: Final answer
    x = 123,831.46

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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.