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Finding the Fourth Proportional to 155,643.60, 214,779.36 and 91,987.32

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Solution

The fourth proportional to 155,643.60, 214,779.36 and 91,987.32 is: 126,937.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,643.60 : 214,779.36 = 91,987.32 : x
  2. Step 2: Convert to fraction form
    155,643.60/214,779.36 = 91,987.32/x
  3. Step 3: Cross multiply
    155,643.60x = 214,779.36 × 91,987.32
  4. Step 4: Simplify right side
    155,643.60x = 19,756,977,717.72
  5. Step 5: Solve for x
    x = 19,756,977,717.72/155,643.60
  6. Step 6: Final answer
    x = 126,937.30

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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.