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Finding the Fourth Proportional to 105,118.80, 157,678.20 and 65,720.40

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Solution

The fourth proportional to 105,118.80, 157,678.20 and 65,720.40 is: 98,580.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,118.80 : 157,678.20 = 65,720.40 : x
  2. Step 2: Convert to fraction form
    105,118.80/157,678.20 = 65,720.40/x
  3. Step 3: Cross multiply
    105,118.80x = 157,678.20 × 65,720.40
  4. Step 4: Simplify right side
    105,118.80x = 10,362,674,375.28
  5. Step 5: Solve for x
    x = 10,362,674,375.28/105,118.80
  6. Step 6: Final answer
    x = 98,580.60

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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.