Home / 208,178.02-312,131.71-81,830.63

Finding the Fourth Proportional to 208,178.02, 312,131.71 and 81,830.63

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Solution

The fourth proportional to 208,178.02, 312,131.71 and 81,830.63 is: 122,692.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,178.02 : 312,131.71 = 81,830.63 : x
  2. Step 2: Convert to fraction form
    208,178.02/312,131.71 = 81,830.63/x
  3. Step 3: Cross multiply
    208,178.02x = 312,131.71 × 81,830.63
  4. Step 4: Simplify right side
    208,178.02x = 25,541,932,502.47
  5. Step 5: Solve for x
    x = 25,541,932,502.47/208,178.02
  6. Step 6: Final answer
    x = 122,692.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.