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Finding the Fourth Proportional to 211,959.79, 292,303.65 and 139,234.75

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Solution

The fourth proportional to 211,959.79, 292,303.65 and 139,234.75 is: 192,012.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,959.79 : 292,303.65 = 139,234.75 : x
  2. Step 2: Convert to fraction form
    211,959.79/292,303.65 = 139,234.75/x
  3. Step 3: Cross multiply
    211,959.79x = 292,303.65 × 139,234.75
  4. Step 4: Simplify right side
    211,959.79x = 40,698,825,631.84
  5. Step 5: Solve for x
    x = 40,698,825,631.84/211,959.79
  6. Step 6: Final answer
    x = 192,012.01

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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.