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Finding the Fourth Proportional to 77,047.60, 115,587.60 and 43,740.40

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Solution

The fourth proportional to 77,047.60, 115,587.60 and 43,740.40 is: 65,619.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,047.60 : 115,587.60 = 43,740.40 : x
  2. Step 2: Convert to fraction form
    77,047.60/115,587.60 = 43,740.40/x
  3. Step 3: Cross multiply
    77,047.60x = 115,587.60 × 43,740.40
  4. Step 4: Simplify right side
    77,047.60x = 5,055,847,859.04
  5. Step 5: Solve for x
    x = 5,055,847,859.04/77,047.60
  6. Step 6: Final answer
    x = 65,619.80

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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.