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Finding the Fourth Proportional to 153,783.24, 212,220.90 and 86,715.24

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Solution

The fourth proportional to 153,783.24, 212,220.90 and 86,715.24 is: 119,667.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,783.24 : 212,220.90 = 86,715.24 : x
  2. Step 2: Convert to fraction form
    153,783.24/212,220.90 = 86,715.24/x
  3. Step 3: Cross multiply
    153,783.24x = 212,220.90 × 86,715.24
  4. Step 4: Simplify right side
    153,783.24x = 18,402,786,276.52
  5. Step 5: Solve for x
    x = 18,402,786,276.52/153,783.24
  6. Step 6: Final answer
    x = 119,667.05

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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.