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Finding the Fourth Proportional to 109,431.55, 151,006.49 and 61,696.63

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Solution

The fourth proportional to 109,431.55, 151,006.49 and 61,696.63 is: 85,136.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,431.55 : 151,006.49 = 61,696.63 : x
  2. Step 2: Convert to fraction form
    109,431.55/151,006.49 = 61,696.63/x
  3. Step 3: Cross multiply
    109,431.55x = 151,006.49 × 61,696.63
  4. Step 4: Simplify right side
    109,431.55x = 9,316,591,541.13
  5. Step 5: Solve for x
    x = 9,316,591,541.13/109,431.55
  6. Step 6: Final answer
    x = 85,136.25

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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.