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Finding the Fourth Proportional to 62,974.16, 86,946.16 and 39,136.40

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Solution

The fourth proportional to 62,974.16, 86,946.16 and 39,136.40 is: 54,034.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,974.16 : 86,946.16 = 39,136.40 : x
  2. Step 2: Convert to fraction form
    62,974.16/86,946.16 = 39,136.40/x
  3. Step 3: Cross multiply
    62,974.16x = 86,946.16 × 39,136.40
  4. Step 4: Simplify right side
    62,974.16x = 3,402,759,696.22
  5. Step 5: Solve for x
    x = 3,402,759,696.22/62,974.16
  6. Step 6: Final answer
    x = 54,034.22

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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.