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Finding the Fourth Proportional to 85,798.63, 118,362.05 and 53,985.07

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Solution

The fourth proportional to 85,798.63, 118,362.05 and 53,985.07 is: 74,474.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,798.63 : 118,362.05 = 53,985.07 : x
  2. Step 2: Convert to fraction form
    85,798.63/118,362.05 = 53,985.07/x
  3. Step 3: Cross multiply
    85,798.63x = 118,362.05 × 53,985.07
  4. Step 4: Simplify right side
    85,798.63x = 6,389,783,554.59
  5. Step 5: Solve for x
    x = 6,389,783,554.59/85,798.63
  6. Step 6: Final answer
    x = 74,474.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.