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Finding the Fourth Proportional to 128,004.96, 176,656.86 and 70,655.67

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Solution

The fourth proportional to 128,004.96, 176,656.86 and 70,655.67 is: 97,510.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,004.96 : 176,656.86 = 70,655.67 : x
  2. Step 2: Convert to fraction form
    128,004.96/176,656.86 = 70,655.67/x
  3. Step 3: Cross multiply
    128,004.96x = 176,656.86 × 70,655.67
  4. Step 4: Simplify right side
    128,004.96x = 12,481,808,405.91
  5. Step 5: Solve for x
    x = 12,481,808,405.91/128,004.96
  6. Step 6: Final answer
    x = 97,510.35

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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.