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Finding the Fourth Proportional to 78,810.48, 118,248.24 and 43,708.32

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Solution

The fourth proportional to 78,810.48, 118,248.24 and 43,708.32 is: 65,580.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,810.48 : 118,248.24 = 43,708.32 : x
  2. Step 2: Convert to fraction form
    78,810.48/118,248.24 = 43,708.32/x
  3. Step 3: Cross multiply
    78,810.48x = 118,248.24 × 43,708.32
  4. Step 4: Simplify right side
    78,810.48x = 5,168,431,913.36
  5. Step 5: Solve for x
    x = 5,168,431,913.36/78,810.48
  6. Step 6: Final answer
    x = 65,580.52

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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.