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Finding the Fourth Proportional to 223,312.80, 308,220.32 and 137,345.72

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Solution

The fourth proportional to 223,312.80, 308,220.32 and 137,345.72 is: 189,567.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,312.80 : 308,220.32 = 137,345.72 : x
  2. Step 2: Convert to fraction form
    223,312.80/308,220.32 = 137,345.72/x
  3. Step 3: Cross multiply
    223,312.80x = 308,220.32 × 137,345.72
  4. Step 4: Simplify right side
    223,312.80x = 42,332,741,769.03
  5. Step 5: Solve for x
    x = 42,332,741,769.03/223,312.80
  6. Step 6: Final answer
    x = 189,567.02

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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.