Home / 30,215,743.80-45,323,615.70-21,128,102.70

Finding the Fourth Proportional to 30,215,743.80, 45,323,615.70 and 21,128,102.70

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Solution

The fourth proportional to 30,215,743.80, 45,323,615.70 and 21,128,102.70 is: 31,692,154.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,215,743.80 : 45,323,615.70 = 21,128,102.70 : x
  2. Step 2: Convert to fraction form
    30,215,743.80/45,323,615.70 = 21,128,102.70/x
  3. Step 3: Cross multiply
    30,215,743.80x = 45,323,615.70 × 21,128,102.70
  4. Step 4: Simplify right side
    30,215,743.80x = 957,602,007,244,932.38
  5. Step 5: Solve for x
    x = 957,602,007,244,932.38/30,215,743.80
  6. Step 6: Final answer
    x = 31,692,154.05

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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.