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Finding the Fourth Proportional to 105,364.80, 158,047.20 and 55,425.60

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Solution

The fourth proportional to 105,364.80, 158,047.20 and 55,425.60 is: 83,138.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,364.80 : 158,047.20 = 55,425.60 : x
  2. Step 2: Convert to fraction form
    105,364.80/158,047.20 = 55,425.60/x
  3. Step 3: Cross multiply
    105,364.80x = 158,047.20 × 55,425.60
  4. Step 4: Simplify right side
    105,364.80x = 8,759,860,888.32
  5. Step 5: Solve for x
    x = 8,759,860,888.32/105,364.80
  6. Step 6: Final answer
    x = 83,138.40

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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.