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Finding the Fourth Proportional to 61,133.04, 84,381.60 and 39,915.60

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Solution

The fourth proportional to 61,133.04, 84,381.60 and 39,915.60 is: 55,095.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,133.04 : 84,381.60 = 39,915.60 : x
  2. Step 2: Convert to fraction form
    61,133.04/84,381.60 = 39,915.60/x
  3. Step 3: Cross multiply
    61,133.04x = 84,381.60 × 39,915.60
  4. Step 4: Simplify right side
    61,133.04x = 3,368,142,192.96
  5. Step 5: Solve for x
    x = 3,368,142,192.96/61,133.04
  6. Step 6: Final answer
    x = 55,095.28

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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.