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Finding the Fourth Proportional to 145,811.40, 218,717.10 and 98,809.80

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Solution

The fourth proportional to 145,811.40, 218,717.10 and 98,809.80 is: 148,214.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,811.40 : 218,717.10 = 98,809.80 : x
  2. Step 2: Convert to fraction form
    145,811.40/218,717.10 = 98,809.80/x
  3. Step 3: Cross multiply
    145,811.40x = 218,717.10 × 98,809.80
  4. Step 4: Simplify right side
    145,811.40x = 21,611,392,907.58
  5. Step 5: Solve for x
    x = 21,611,392,907.58/145,811.40
  6. Step 6: Final answer
    x = 148,214.70

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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.