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Finding the Fourth Proportional to 105,661.98, 145,817.19 and 57,915.27

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Solution

The fourth proportional to 105,661.98, 145,817.19 and 57,915.27 is: 79,925.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,661.98 : 145,817.19 = 57,915.27 : x
  2. Step 2: Convert to fraction form
    105,661.98/145,817.19 = 57,915.27/x
  3. Step 3: Cross multiply
    105,661.98x = 145,817.19 × 57,915.27
  4. Step 4: Simplify right side
    105,661.98x = 8,445,041,929.49
  5. Step 5: Solve for x
    x = 8,445,041,929.49/105,661.98
  6. Step 6: Final answer
    x = 79,925.08

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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.