Home / 77,639.88-107,146.89-47,420.31

Finding the Fourth Proportional to 77,639.88, 107,146.89 and 47,420.31

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Solution

The fourth proportional to 77,639.88, 107,146.89 and 47,420.31 is: 65,442.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,639.88 : 107,146.89 = 47,420.31 : x
  2. Step 2: Convert to fraction form
    77,639.88/107,146.89 = 47,420.31/x
  3. Step 3: Cross multiply
    77,639.88x = 107,146.89 × 47,420.31
  4. Step 4: Simplify right side
    77,639.88x = 5,080,938,502.23
  5. Step 5: Solve for x
    x = 5,080,938,502.23/77,639.88
  6. Step 6: Final answer
    x = 65,442.38

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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.