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Finding the Fourth Proportional to 161,886.70, 242,828.53 and 90,809.20

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Solution

The fourth proportional to 161,886.70, 242,828.53 and 90,809.20 is: 136,212.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,886.70 : 242,828.53 = 90,809.20 : x
  2. Step 2: Convert to fraction form
    161,886.70/242,828.53 = 90,809.20/x
  3. Step 3: Cross multiply
    161,886.70x = 242,828.53 × 90,809.20
  4. Step 4: Simplify right side
    161,886.70x = 22,051,062,878.29
  5. Step 5: Solve for x
    x = 22,051,062,878.29/161,886.70
  6. Step 6: Final answer
    x = 136,212.94

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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.