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Finding the Fourth Proportional to 161,709.76, 223,165.16 and 90,094.20

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Solution

The fourth proportional to 161,709.76, 223,165.16 and 90,094.20 is: 124,333.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,709.76 : 223,165.16 = 90,094.20 : x
  2. Step 2: Convert to fraction form
    161,709.76/223,165.16 = 90,094.20/x
  3. Step 3: Cross multiply
    161,709.76x = 223,165.16 × 90,094.20
  4. Step 4: Simplify right side
    161,709.76x = 20,105,886,558.07
  5. Step 5: Solve for x
    x = 20,105,886,558.07/161,709.76
  6. Step 6: Final answer
    x = 124,333.17

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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.