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Finding the Fourth Proportional to 208,381.60, 312,111.60 and 83,658.40

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Solution

The fourth proportional to 208,381.60, 312,111.60 and 83,658.40 is: 125,302.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,381.60 : 312,111.60 = 83,658.40 : x
  2. Step 2: Convert to fraction form
    208,381.60/312,111.60 = 83,658.40/x
  3. Step 3: Cross multiply
    208,381.60x = 312,111.60 × 83,658.40
  4. Step 4: Simplify right side
    208,381.60x = 26,110,757,077.44
  5. Step 5: Solve for x
    x = 26,110,757,077.44/208,381.60
  6. Step 6: Final answer
    x = 125,302.60

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1.5x scale

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.