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Finding the Fourth Proportional to 68,437.80, 94,455.57 and 66,638.99

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Solution

The fourth proportional to 68,437.80, 94,455.57 and 66,638.99 is: 91,972.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,437.80 : 94,455.57 = 66,638.99 : x
  2. Step 2: Convert to fraction form
    68,437.80/94,455.57 = 66,638.99/x
  3. Step 3: Cross multiply
    68,437.80x = 94,455.57 × 66,638.99
  4. Step 4: Simplify right side
    68,437.80x = 6,294,423,312.40
  5. Step 5: Solve for x
    x = 6,294,423,312.40/68,437.80
  6. Step 6: Final answer
    x = 91,972.91

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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.