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Finding the Fourth Proportional to 288,081.60, 432,122.40 and 77,740.80

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Solution

The fourth proportional to 288,081.60, 432,122.40 and 77,740.80 is: 116,611.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,081.60 : 432,122.40 = 77,740.80 : x
  2. Step 2: Convert to fraction form
    288,081.60/432,122.40 = 77,740.80/x
  3. Step 3: Cross multiply
    288,081.60x = 432,122.40 × 77,740.80
  4. Step 4: Simplify right side
    288,081.60x = 33,593,541,073.92
  5. Step 5: Solve for x
    x = 33,593,541,073.92/288,081.60
  6. Step 6: Final answer
    x = 116,611.20

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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.