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Finding the Fourth Proportional to 186,128.76, 279,031.86 and 75,248.76

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Solution

The fourth proportional to 186,128.76, 279,031.86 and 75,248.76 is: 112,807.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,128.76 : 279,031.86 = 75,248.76 : x
  2. Step 2: Convert to fraction form
    186,128.76/279,031.86 = 75,248.76/x
  3. Step 3: Cross multiply
    186,128.76x = 279,031.86 × 75,248.76
  4. Step 4: Simplify right side
    186,128.76x = 20,996,801,465.49
  5. Step 5: Solve for x
    x = 20,996,801,465.49/186,128.76
  6. Step 6: Final answer
    x = 112,807.94

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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.