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Finding the Fourth Proportional to 112,280, 154,939.04 and 61,978.56

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Solution

The fourth proportional to 112,280, 154,939.04 and 61,978.56 is: 85,526.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,280 : 154,939.04 = 61,978.56 : x
  2. Step 2: Convert to fraction form
    112,280/154,939.04 = 61,978.56/x
  3. Step 3: Cross multiply
    112,280x = 154,939.04 × 61,978.56
  4. Step 4: Simplify right side
    112,280x = 9,602,898,586.98
  5. Step 5: Solve for x
    x = 9,602,898,586.98/112,280
  6. Step 6: Final answer
    x = 85,526.35

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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.