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Finding the Fourth Proportional to 223,643.48, 308,620.97 and 121,666.33

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Solution

The fourth proportional to 223,643.48, 308,620.97 and 121,666.33 is: 167,895.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,643.48 : 308,620.97 = 121,666.33 : x
  2. Step 2: Convert to fraction form
    223,643.48/308,620.97 = 121,666.33/x
  3. Step 3: Cross multiply
    223,643.48x = 308,620.97 × 121,666.33
  4. Step 4: Simplify right side
    223,643.48x = 37,548,779,401.06
  5. Step 5: Solve for x
    x = 37,548,779,401.06/223,643.48
  6. Step 6: Final answer
    x = 167,895.70

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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.