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Finding the Fourth Proportional to 157,394, 217,212.84 and 90,330.32

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Solution

The fourth proportional to 157,394, 217,212.84 and 90,330.32 is: 124,661.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,394 : 217,212.84 = 90,330.32 : x
  2. Step 2: Convert to fraction form
    157,394/217,212.84 = 90,330.32/x
  3. Step 3: Cross multiply
    157,394x = 217,212.84 × 90,330.32
  4. Step 4: Simplify right side
    157,394x = 19,620,905,345.31
  5. Step 5: Solve for x
    x = 19,620,905,345.31/157,394
  6. Step 6: Final answer
    x = 124,661.08

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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.