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Finding the Fourth Proportional to 86,038.80, 128,803.05 and 63,950.10

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Solution

The fourth proportional to 86,038.80, 128,803.05 and 63,950.10 is: 95,735.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,038.80 : 128,803.05 = 63,950.10 : x
  2. Step 2: Convert to fraction form
    86,038.80/128,803.05 = 63,950.10/x
  3. Step 3: Cross multiply
    86,038.80x = 128,803.05 × 63,950.10
  4. Step 4: Simplify right side
    86,038.80x = 8,236,967,927.81
  5. Step 5: Solve for x
    x = 8,236,967,927.81/86,038.80
  6. Step 6: Final answer
    x = 95,735.50

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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.