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Finding the Fourth Proportional to 261,415.53, 392,123.19 and 74,427.03

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Solution

The fourth proportional to 261,415.53, 392,123.19 and 74,427.03 is: 111,640.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,415.53 : 392,123.19 = 74,427.03 : x
  2. Step 2: Convert to fraction form
    261,415.53/392,123.19 = 74,427.03/x
  3. Step 3: Cross multiply
    261,415.53x = 392,123.19 × 74,427.03
  4. Step 4: Simplify right side
    261,415.53x = 29,184,564,425.83
  5. Step 5: Solve for x
    x = 29,184,564,425.83/261,415.53
  6. Step 6: Final answer
    x = 111,640.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.