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Finding the Fourth Proportional to 121,089.60, 181,504.80 and 54,518.40

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Solution

The fourth proportional to 121,089.60, 181,504.80 and 54,518.40 is: 81,719.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,089.60 : 181,504.80 = 54,518.40 : x
  2. Step 2: Convert to fraction form
    121,089.60/181,504.80 = 54,518.40/x
  3. Step 3: Cross multiply
    121,089.60x = 181,504.80 × 54,518.40
  4. Step 4: Simplify right side
    121,089.60x = 9,895,351,288.32
  5. Step 5: Solve for x
    x = 9,895,351,288.32/121,089.60
  6. Step 6: Final answer
    x = 81,719.25

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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.