Home / 81,127.17-112,032.18-76,709.43

Finding the Fourth Proportional to 81,127.17, 112,032.18 and 76,709.43

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Solution

The fourth proportional to 81,127.17, 112,032.18 and 76,709.43 is: 105,931.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,127.17 : 112,032.18 = 76,709.43 : x
  2. Step 2: Convert to fraction form
    81,127.17/112,032.18 = 76,709.43/x
  3. Step 3: Cross multiply
    81,127.17x = 112,032.18 × 76,709.43
  4. Step 4: Simplify right side
    81,127.17x = 8,593,924,669.46
  5. Step 5: Solve for x
    x = 8,593,924,669.46/81,127.17
  6. Step 6: Final answer
    x = 105,931.52

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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.