Home / 430,128.47-645,151-130,611.65

Finding the Fourth Proportional to 430,128.47, 645,151 and 130,611.65

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Solution

The fourth proportional to 430,128.47, 645,151 and 130,611.65 is: 195,904.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,128.47 : 645,151 = 130,611.65 : x
  2. Step 2: Convert to fraction form
    430,128.47/645,151 = 130,611.65/x
  3. Step 3: Cross multiply
    430,128.47x = 645,151 × 130,611.65
  4. Step 4: Simplify right side
    430,128.47x = 84,264,236,609.15
  5. Step 5: Solve for x
    x = 84,264,236,609.15/430,128.47
  6. Step 6: Final answer
    x = 195,904.81

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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.