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Finding the Fourth Proportional to 84,420.69, 126,649.76 and 31,830.63

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Solution

The fourth proportional to 84,420.69, 126,649.76 and 31,830.63 is: 47,753.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,420.69 : 126,649.76 = 31,830.63 : x
  2. Step 2: Convert to fraction form
    84,420.69/126,649.76 = 31,830.63/x
  3. Step 3: Cross multiply
    84,420.69x = 126,649.76 × 31,830.63
  4. Step 4: Simplify right side
    84,420.69x = 4,031,341,491.00
  5. Step 5: Solve for x
    x = 4,031,341,491.00/84,420.69
  6. Step 6: Final answer
    x = 47,753.00

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1.5x scale

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.