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Finding the Fourth Proportional to 77,858.19, 116,787.36 and 21,698.46

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Solution

The fourth proportional to 77,858.19, 116,787.36 and 21,698.46 is: 32,547.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,858.19 : 116,787.36 = 21,698.46 : x
  2. Step 2: Convert to fraction form
    77,858.19/116,787.36 = 21,698.46/x
  3. Step 3: Cross multiply
    77,858.19x = 116,787.36 × 21,698.46
  4. Step 4: Simplify right side
    77,858.19x = 2,534,105,859.47
  5. Step 5: Solve for x
    x = 2,534,105,859.47/77,858.19
  6. Step 6: Final answer
    x = 32,547.71

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1.5x scale

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.