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Finding the Fourth Proportional to 118,779.40, 178,170.99 and 39,894.31

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Solution

The fourth proportional to 118,779.40, 178,170.99 and 39,894.31 is: 59,842.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,779.40 : 178,170.99 = 39,894.31 : x
  2. Step 2: Convert to fraction form
    118,779.40/178,170.99 = 39,894.31/x
  3. Step 3: Cross multiply
    118,779.40x = 178,170.99 × 39,894.31
  4. Step 4: Simplify right side
    118,779.40x = 7,108,008,708.07
  5. Step 5: Solve for x
    x = 7,108,008,708.07/118,779.40
  6. Step 6: Final answer
    x = 59,842.10

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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.