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Finding the Fourth Proportional to 70,139.44, 105,208.98 and 57,777.76

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Solution

The fourth proportional to 70,139.44, 105,208.98 and 57,777.76 is: 86,666.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,139.44 : 105,208.98 = 57,777.76 : x
  2. Step 2: Convert to fraction form
    70,139.44/105,208.98 = 57,777.76/x
  3. Step 3: Cross multiply
    70,139.44x = 105,208.98 × 57,777.76
  4. Step 4: Simplify right side
    70,139.44x = 6,078,739,196.28
  5. Step 5: Solve for x
    x = 6,078,739,196.28/70,139.44
  6. Step 6: Final answer
    x = 86,666.49

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.