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Finding the Fourth Proportional to 261,878.37, 392,840.18 and 72,338.67

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Solution

The fourth proportional to 261,878.37, 392,840.18 and 72,338.67 is: 108,514.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,878.37 : 392,840.18 = 72,338.67 : x
  2. Step 2: Convert to fraction form
    261,878.37/392,840.18 = 72,338.67/x
  3. Step 3: Cross multiply
    261,878.37x = 392,840.18 × 72,338.67
  4. Step 4: Simplify right side
    261,878.37x = 28,417,536,053.34
  5. Step 5: Solve for x
    x = 28,417,536,053.34/261,878.37
  6. Step 6: Final answer
    x = 108,514.26

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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.