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Finding the Fourth Proportional to 128,000.56, 176,639.53 and 70,640.41

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Solution

The fourth proportional to 128,000.56, 176,639.53 and 70,640.41 is: 97,483.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,000.56 : 176,639.53 = 70,640.41 : x
  2. Step 2: Convert to fraction form
    128,000.56/176,639.53 = 70,640.41/x
  3. Step 3: Cross multiply
    128,000.56x = 176,639.53 × 70,640.41
  4. Step 4: Simplify right side
    128,000.56x = 12,477,888,821.41
  5. Step 5: Solve for x
    x = 12,477,888,821.41/128,000.56
  6. Step 6: Final answer
    x = 97,483.08

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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.