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Finding the Fourth Proportional to 190,646.68, 285,784.08 and 90,780.04

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Solution

The fourth proportional to 190,646.68, 285,784.08 and 90,780.04 is: 136,081.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,646.68 : 285,784.08 = 90,780.04 : x
  2. Step 2: Convert to fraction form
    190,646.68/285,784.08 = 90,780.04/x
  3. Step 3: Cross multiply
    190,646.68x = 285,784.08 × 90,780.04
  4. Step 4: Simplify right side
    190,646.68x = 25,943,490,213.76
  5. Step 5: Solve for x
    x = 25,943,490,213.76/190,646.68
  6. Step 6: Final answer
    x = 136,081.52

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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.