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Finding the Fourth Proportional to 77,021.99, 106,295.34 and 43,030.66

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Solution

The fourth proportional to 77,021.99, 106,295.34 and 43,030.66 is: 59,385.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,021.99 : 106,295.34 = 43,030.66 : x
  2. Step 2: Convert to fraction form
    77,021.99/106,295.34 = 43,030.66/x
  3. Step 3: Cross multiply
    77,021.99x = 106,295.34 × 43,030.66
  4. Step 4: Simplify right side
    77,021.99x = 4,573,958,419.97
  5. Step 5: Solve for x
    x = 4,573,958,419.97/77,021.99
  6. Step 6: Final answer
    x = 59,385.10

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1.5x scale

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.