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Finding the Fourth Proportional to 60,509,188.40, 90,751,972.80 and 20,119,672.40

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Solution

The fourth proportional to 60,509,188.40, 90,751,972.80 and 20,119,672.40 is: 30,175,581.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,509,188.40 : 90,751,972.80 = 20,119,672.40 : x
  2. Step 2: Convert to fraction form
    60,509,188.40/90,751,972.80 = 20,119,672.40/x
  3. Step 3: Cross multiply
    60,509,188.40x = 90,751,972.80 × 20,119,672.40
  4. Step 4: Simplify right side
    60,509,188.40x = 1,825,899,962,389,710.50
  5. Step 5: Solve for x
    x = 1,825,899,962,389,710.50/60,509,188.40
  6. Step 6: Final answer
    x = 30,175,581.77

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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.