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Finding the Fourth Proportional to 153,779.58, 212,217.57 and 86,711.58

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Solution

The fourth proportional to 153,779.58, 212,217.57 and 86,711.58 is: 119,662.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,779.58 : 212,217.57 = 86,711.58 : x
  2. Step 2: Convert to fraction form
    153,779.58/212,217.57 = 86,711.58/x
  3. Step 3: Cross multiply
    153,779.58x = 212,217.57 × 86,711.58
  4. Step 4: Simplify right side
    153,779.58x = 18,401,720,798.46
  5. Step 5: Solve for x
    x = 18,401,720,798.46/153,779.58
  6. Step 6: Final answer
    x = 119,662.97

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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.