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Finding the Fourth Proportional to 220,574,530.80, 330,861,796.20 and 123,828,649.20

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Solution

The fourth proportional to 220,574,530.80, 330,861,796.20 and 123,828,649.20 is: 185,742,973.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,574,530.80 : 330,861,796.20 = 123,828,649.20 : x
  2. Step 2: Convert to fraction form
    220,574,530.80/330,861,796.20 = 123,828,649.20/x
  3. Step 3: Cross multiply
    220,574,530.80x = 330,861,796.20 × 123,828,649.20
  4. Step 4: Simplify right side
    220,574,530.80x = 40,970,169,295,331,696
  5. Step 5: Solve for x
    x = 40,970,169,295,331,696/220,574,530.80
  6. Step 6: Final answer
    x = 185,742,973.80

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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.