Home / 430,128.72-645,151.37-130,611.89

Finding the Fourth Proportional to 430,128.72, 645,151.37 and 130,611.89

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Solution

The fourth proportional to 430,128.72, 645,151.37 and 130,611.89 is: 195,905.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,128.72 : 645,151.37 = 130,611.89 : x
  2. Step 2: Convert to fraction form
    430,128.72/645,151.37 = 130,611.89/x
  3. Step 3: Cross multiply
    430,128.72x = 645,151.37 × 130,611.89
  4. Step 4: Simplify right side
    430,128.72x = 84,264,440,731.61
  5. Step 5: Solve for x
    x = 84,264,440,731.61/430,128.72
  6. Step 6: Final answer
    x = 195,905.17

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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.