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Finding the Fourth Proportional to 156,775.78, 216,267.65 and 99,313.72

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Solution

The fourth proportional to 156,775.78, 216,267.65 and 99,313.72 is: 137,000.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,775.78 : 216,267.65 = 99,313.72 : x
  2. Step 2: Convert to fraction form
    156,775.78/216,267.65 = 99,313.72/x
  3. Step 3: Cross multiply
    156,775.78x = 216,267.65 × 99,313.72
  4. Step 4: Simplify right side
    156,775.78x = 21,478,344,501.28
  5. Step 5: Solve for x
    x = 21,478,344,501.28/156,775.78
  6. Step 6: Final answer
    x = 137,000.40

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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.