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Finding the Fourth Proportional to 60,979,876.84, 91,834,893.67 and 55,537,921

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Solution

The fourth proportional to 60,979,876.84, 91,834,893.67 and 55,537,921 is: 83,639,379.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,979,876.84 : 91,834,893.67 = 55,537,921 : x
  2. Step 2: Convert to fraction form
    60,979,876.84/91,834,893.67 = 55,537,921/x
  3. Step 3: Cross multiply
    60,979,876.84x = 91,834,893.67 × 55,537,921
  4. Step 4: Simplify right side
    60,979,876.84x = 5,100,319,069,687,860
  5. Step 5: Solve for x
    x = 5,100,319,069,687,860/60,979,876.84
  6. Step 6: Final answer
    x = 83,639,379.64

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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.