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Finding the Fourth Proportional to 161,941.71, 223,479.90 and 90,319.89

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Solution

The fourth proportional to 161,941.71, 223,479.90 and 90,319.89 is: 124,641.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,941.71 : 223,479.90 = 90,319.89 : x
  2. Step 2: Convert to fraction form
    161,941.71/223,479.90 = 90,319.89/x
  3. Step 3: Cross multiply
    161,941.71x = 223,479.90 × 90,319.89
  4. Step 4: Simplify right side
    161,941.71x = 20,184,679,985.21
  5. Step 5: Solve for x
    x = 20,184,679,985.21/161,941.71
  6. Step 6: Final answer
    x = 124,641.64

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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.