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Finding the Fourth Proportional to 105,120.80, 157,681.20 and 65,722.40

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Solution

The fourth proportional to 105,120.80, 157,681.20 and 65,722.40 is: 98,583.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,120.80 : 157,681.20 = 65,722.40 : x
  2. Step 2: Convert to fraction form
    105,120.80/157,681.20 = 65,722.40/x
  3. Step 3: Cross multiply
    105,120.80x = 157,681.20 × 65,722.40
  4. Step 4: Simplify right side
    105,120.80x = 10,363,186,898.88
  5. Step 5: Solve for x
    x = 10,363,186,898.88/105,120.80
  6. Step 6: Final answer
    x = 98,583.60

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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.