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Finding the Fourth Proportional to 286,715.10, 430,124.40 and 118,143.30

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Solution

The fourth proportional to 286,715.10, 430,124.40 and 118,143.30 is: 177,236.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,715.10 : 430,124.40 = 118,143.30 : x
  2. Step 2: Convert to fraction form
    286,715.10/430,124.40 = 118,143.30/x
  3. Step 3: Cross multiply
    286,715.10x = 430,124.40 × 118,143.30
  4. Step 4: Simplify right side
    286,715.10x = 50,816,316,026.52
  5. Step 5: Solve for x
    x = 50,816,316,026.52/286,715.10
  6. Step 6: Final answer
    x = 177,236.27

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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.