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Finding the Fourth Proportional to 507,751.42, 761,625.72 and 128,671.06

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Solution

The fourth proportional to 507,751.42, 761,625.72 and 128,671.06 is: 193,006.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    507,751.42 : 761,625.72 = 128,671.06 : x
  2. Step 2: Convert to fraction form
    507,751.42/761,625.72 = 128,671.06/x
  3. Step 3: Cross multiply
    507,751.42x = 761,625.72 × 128,671.06
  4. Step 4: Simplify right side
    507,751.42x = 97,999,188,715.66
  5. Step 5: Solve for x
    x = 97,999,188,715.66/507,751.42
  6. Step 6: Final answer
    x = 193,006.23

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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.