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Finding the Fourth Proportional to 105,940.80, 158,765.40 and 70,300.80

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Solution

The fourth proportional to 105,940.80, 158,765.40 and 70,300.80 is: 105,354.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,940.80 : 158,765.40 = 70,300.80 : x
  2. Step 2: Convert to fraction form
    105,940.80/158,765.40 = 70,300.80/x
  3. Step 3: Cross multiply
    105,940.80x = 158,765.40 × 70,300.80
  4. Step 4: Simplify right side
    105,940.80x = 11,161,334,632.32
  5. Step 5: Solve for x
    x = 11,161,334,632.32/105,940.80
  6. Step 6: Final answer
    x = 105,354.45

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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.