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Finding the Fourth Proportional to 102,987.60, 154,351.80 and 91,323.60

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Solution

The fourth proportional to 102,987.60, 154,351.80 and 91,323.60 is: 136,870.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,987.60 : 154,351.80 = 91,323.60 : x
  2. Step 2: Convert to fraction form
    102,987.60/154,351.80 = 91,323.60/x
  3. Step 3: Cross multiply
    102,987.60x = 154,351.80 × 91,323.60
  4. Step 4: Simplify right side
    102,987.60x = 14,095,962,042.48
  5. Step 5: Solve for x
    x = 14,095,962,042.48/102,987.60
  6. Step 6: Final answer
    x = 136,870.48

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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.