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Finding the Fourth Proportional to 86,686.70, 130,030.05 and 76,664.30

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Solution

The fourth proportional to 86,686.70, 130,030.05 and 76,664.30 is: 114,996.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,686.70 : 130,030.05 = 76,664.30 : x
  2. Step 2: Convert to fraction form
    86,686.70/130,030.05 = 76,664.30/x
  3. Step 3: Cross multiply
    86,686.70x = 130,030.05 × 76,664.30
  4. Step 4: Simplify right side
    86,686.70x = 9,968,662,762.22
  5. Step 5: Solve for x
    x = 9,968,662,762.22/86,686.70
  6. Step 6: Final answer
    x = 114,996.45

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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.