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Finding the Fourth Proportional to 163,903,478.80, 245,855,218.20 and 127,623,773.20

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Solution

The fourth proportional to 163,903,478.80, 245,855,218.20 and 127,623,773.20 is: 191,435,659.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,903,478.80 : 245,855,218.20 = 127,623,773.20 : x
  2. Step 2: Convert to fraction form
    163,903,478.80/245,855,218.20 = 127,623,773.20/x
  3. Step 3: Cross multiply
    163,903,478.80x = 245,855,218.20 × 127,623,773.20
  4. Step 4: Simplify right side
    163,903,478.80x = 31,376,970,607,593,312
  5. Step 5: Solve for x
    x = 31,376,970,607,593,312/163,903,478.80
  6. Step 6: Final answer
    x = 191,435,659.80

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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.