Home / 423,128.49-634,752-123,630.99

Finding the Fourth Proportional to 423,128.49, 634,752 and 123,630.99

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Solution

The fourth proportional to 423,128.49, 634,752 and 123,630.99 is: 185,463.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,128.49 : 634,752 = 123,630.99 : x
  2. Step 2: Convert to fraction form
    423,128.49/634,752 = 123,630.99/x
  3. Step 3: Cross multiply
    423,128.49x = 634,752 × 123,630.99
  4. Step 4: Simplify right side
    423,128.49x = 78,475,018,164.48
  5. Step 5: Solve for x
    x = 78,475,018,164.48/423,128.49
  6. Step 6: Final answer
    x = 185,463.80

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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.