Home / 121,301.20-181,951.80-77,014.45

Finding the Fourth Proportional to 121,301.20, 181,951.80 and 77,014.45

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Solution

The fourth proportional to 121,301.20, 181,951.80 and 77,014.45 is: 115,521.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,301.20 : 181,951.80 = 77,014.45 : x
  2. Step 2: Convert to fraction form
    121,301.20/181,951.80 = 77,014.45/x
  3. Step 3: Cross multiply
    121,301.20x = 181,951.80 × 77,014.45
  4. Step 4: Simplify right side
    121,301.20x = 14,012,917,803.51
  5. Step 5: Solve for x
    x = 14,012,917,803.51/121,301.20
  6. Step 6: Final answer
    x = 115,521.68

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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.