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Finding the Fourth Proportional to 105,190.40, 157,708.80 and 42,828.80

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Solution

The fourth proportional to 105,190.40, 157,708.80 and 42,828.80 is: 64,211.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,190.40 : 157,708.80 = 42,828.80 : x
  2. Step 2: Convert to fraction form
    105,190.40/157,708.80 = 42,828.80/x
  3. Step 3: Cross multiply
    105,190.40x = 157,708.80 × 42,828.80
  4. Step 4: Simplify right side
    105,190.40x = 6,754,478,653.44
  5. Step 5: Solve for x
    x = 6,754,478,653.44/105,190.40
  6. Step 6: Final answer
    x = 64,211.93

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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.