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Finding the Fourth Proportional to 113,140.35, 156,116.35 and 65,384.49

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Solution

The fourth proportional to 113,140.35, 156,116.35 and 65,384.49 is: 90,220.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,140.35 : 156,116.35 = 65,384.49 : x
  2. Step 2: Convert to fraction form
    113,140.35/156,116.35 = 65,384.49/x
  3. Step 3: Cross multiply
    113,140.35x = 156,116.35 × 65,384.49
  4. Step 4: Simplify right side
    113,140.35x = 10,207,587,925.41
  5. Step 5: Solve for x
    x = 10,207,587,925.41/113,140.35
  6. Step 6: Final answer
    x = 90,220.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.