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Finding the Fourth Proportional to 215,346, 297,155.40 and 124,731.40

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Solution

The fourth proportional to 215,346, 297,155.40 and 124,731.40 is: 172,116.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,346 : 297,155.40 = 124,731.40 : x
  2. Step 2: Convert to fraction form
    215,346/297,155.40 = 124,731.40/x
  3. Step 3: Cross multiply
    215,346x = 297,155.40 × 124,731.40
  4. Step 4: Simplify right side
    215,346x = 37,064,609,059.56
  5. Step 5: Solve for x
    x = 37,064,609,059.56/215,346
  6. Step 6: Final answer
    x = 172,116.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.