Home / 423,128.10-634,287.60-156,817.20

Finding the Fourth Proportional to 423,128.10, 634,287.60 and 156,817.20

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Solution

The fourth proportional to 423,128.10, 634,287.60 and 156,817.20 is: 235,075.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,128.10 : 634,287.60 = 156,817.20 : x
  2. Step 2: Convert to fraction form
    423,128.10/634,287.60 = 156,817.20/x
  3. Step 3: Cross multiply
    423,128.10x = 634,287.60 × 156,817.20
  4. Step 4: Simplify right side
    423,128.10x = 99,467,205,426.72
  5. Step 5: Solve for x
    x = 99,467,205,426.72/423,128.10
  6. Step 6: Final answer
    x = 235,075.87

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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.