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Finding the Fourth Proportional to 86,791.60, 130,187.40 and 42,446.80

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Solution

The fourth proportional to 86,791.60, 130,187.40 and 42,446.80 is: 63,670.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,791.60 : 130,187.40 = 42,446.80 : x
  2. Step 2: Convert to fraction form
    86,791.60/130,187.40 = 42,446.80/x
  3. Step 3: Cross multiply
    86,791.60x = 130,187.40 × 42,446.80
  4. Step 4: Simplify right side
    86,791.60x = 5,526,038,530.32
  5. Step 5: Solve for x
    x = 5,526,038,530.32/86,791.60
  6. Step 6: Final answer
    x = 63,670.20

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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.