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Finding the Fourth Proportional to 155,779.47, 214,969.46 and 87,810.55

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Solution

The fourth proportional to 155,779.47, 214,969.46 and 87,810.55 is: 121,175.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,779.47 : 214,969.46 = 87,810.55 : x
  2. Step 2: Convert to fraction form
    155,779.47/214,969.46 = 87,810.55/x
  3. Step 3: Cross multiply
    155,779.47x = 214,969.46 × 87,810.55
  4. Step 4: Simplify right side
    155,779.47x = 18,876,585,539.33
  5. Step 5: Solve for x
    x = 18,876,585,539.33/155,779.47
  6. Step 6: Final answer
    x = 121,175.05

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1.5x scale

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.