Home / 30,513,145.07-42,119,189.58-20,203,189.67

Finding the Fourth Proportional to 30,513,145.07, 42,119,189.58 and 20,203,189.67

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Solution

The fourth proportional to 30,513,145.07, 42,119,189.58 and 20,203,189.67 is: 27,887,717.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,513,145.07 : 42,119,189.58 = 20,203,189.67 : x
  2. Step 2: Convert to fraction form
    30,513,145.07/42,119,189.58 = 20,203,189.67/x
  3. Step 3: Cross multiply
    30,513,145.07x = 42,119,189.58 × 20,203,189.67
  4. Step 4: Simplify right side
    30,513,145.07x = 850,941,975,620,831.62
  5. Step 5: Solve for x
    x = 850,941,975,620,831.62/30,513,145.07
  6. Step 6: Final answer
    x = 27,887,717.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.