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Finding the Fourth Proportional to 186,428.04, 279,531.46 and 74,047.80

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Solution

The fourth proportional to 186,428.04, 279,531.46 and 74,047.80 is: 111,027.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,428.04 : 279,531.46 = 74,047.80 : x
  2. Step 2: Convert to fraction form
    186,428.04/279,531.46 = 74,047.80/x
  3. Step 3: Cross multiply
    186,428.04x = 279,531.46 × 74,047.80
  4. Step 4: Simplify right side
    186,428.04x = 20,698,689,643.79
  5. Step 5: Solve for x
    x = 20,698,689,643.79/186,428.04
  6. Step 6: Final answer
    x = 111,027.77

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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.