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Finding the Fourth Proportional to 116,505.60, 174,889.80 and 77,139.60

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Solution

The fourth proportional to 116,505.60, 174,889.80 and 77,139.60 is: 115,796.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,505.60 : 174,889.80 = 77,139.60 : x
  2. Step 2: Convert to fraction form
    116,505.60/174,889.80 = 77,139.60/x
  3. Step 3: Cross multiply
    116,505.60x = 174,889.80 × 77,139.60
  4. Step 4: Simplify right side
    116,505.60x = 13,490,929,216.08
  5. Step 5: Solve for x
    x = 13,490,929,216.08/116,505.60
  6. Step 6: Final answer
    x = 115,796.40

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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.