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Finding the Fourth Proportional to 103,110.90, 154,666.35 and 76,866.90

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Solution

The fourth proportional to 103,110.90, 154,666.35 and 76,866.90 is: 115,300.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,110.90 : 154,666.35 = 76,866.90 : x
  2. Step 2: Convert to fraction form
    103,110.90/154,666.35 = 76,866.90/x
  3. Step 3: Cross multiply
    103,110.90x = 154,666.35 × 76,866.90
  4. Step 4: Simplify right side
    103,110.90x = 11,888,722,858.82
  5. Step 5: Solve for x
    x = 11,888,722,858.82/103,110.90
  6. Step 6: Final answer
    x = 115,300.35

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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.