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Finding the Fourth Proportional to 500,007.78, 750,012.06 and 126,030.78

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Solution

The fourth proportional to 500,007.78, 750,012.06 and 126,030.78 is: 189,046.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,007.78 : 750,012.06 = 126,030.78 : x
  2. Step 2: Convert to fraction form
    500,007.78/750,012.06 = 126,030.78/x
  3. Step 3: Cross multiply
    500,007.78x = 750,012.06 × 126,030.78
  4. Step 4: Simplify right side
    500,007.78x = 94,524,604,931.21
  5. Step 5: Solve for x
    x = 94,524,604,931.21/500,007.78
  6. Step 6: Final answer
    x = 189,046.27

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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.