Home / 81,130.17-112,036.32-76,712.43

Finding the Fourth Proportional to 81,130.17, 112,036.32 and 76,712.43

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Solution

The fourth proportional to 81,130.17, 112,036.32 and 76,712.43 is: 105,935.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,130.17 : 112,036.32 = 76,712.43 : x
  2. Step 2: Convert to fraction form
    81,130.17/112,036.32 = 76,712.43/x
  3. Step 3: Cross multiply
    81,130.17x = 112,036.32 × 76,712.43
  4. Step 4: Simplify right side
    81,130.17x = 8,594,578,355.46
  5. Step 5: Solve for x
    x = 8,594,578,355.46/81,130.17
  6. Step 6: Final answer
    x = 105,935.66

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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.