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Finding the Fourth Proportional to 77,036.40, 115,430.40 and 43,657.20

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Solution

The fourth proportional to 77,036.40, 115,430.40 and 43,657.20 is: 65,415.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,036.40 : 115,430.40 = 43,657.20 : x
  2. Step 2: Convert to fraction form
    77,036.40/115,430.40 = 43,657.20/x
  3. Step 3: Cross multiply
    77,036.40x = 115,430.40 × 43,657.20
  4. Step 4: Simplify right side
    77,036.40x = 5,039,368,058.88
  5. Step 5: Solve for x
    x = 5,039,368,058.88/77,036.40
  6. Step 6: Final answer
    x = 65,415.41

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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.