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Finding the Fourth Proportional to 86,010.60, 118,700.46 and 64,756.20

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Solution

The fourth proportional to 86,010.60, 118,700.46 and 64,756.20 is: 89,367.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,010.60 : 118,700.46 = 64,756.20 : x
  2. Step 2: Convert to fraction form
    86,010.60/118,700.46 = 64,756.20/x
  3. Step 3: Cross multiply
    86,010.60x = 118,700.46 × 64,756.20
  4. Step 4: Simplify right side
    86,010.60x = 7,686,590,727.85
  5. Step 5: Solve for x
    x = 7,686,590,727.85/86,010.60
  6. Step 6: Final answer
    x = 89,367.95

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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.