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Finding the Fourth Proportional to 139,458.50, 209,946.62 and 127,058.22

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Solution

The fourth proportional to 139,458.50, 209,946.62 and 127,058.22 is: 191,278.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,458.50 : 209,946.62 = 127,058.22 : x
  2. Step 2: Convert to fraction form
    139,458.50/209,946.62 = 127,058.22/x
  3. Step 3: Cross multiply
    139,458.50x = 209,946.62 × 127,058.22
  4. Step 4: Simplify right side
    139,458.50x = 26,675,443,832.22
  5. Step 5: Solve for x
    x = 26,675,443,832.22/139,458.50
  6. Step 6: Final answer
    x = 191,278.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.