Home / 153,485.28-211,728.60-105,655.86

Finding the Fourth Proportional to 153,485.28, 211,728.60 and 105,655.86

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Solution

The fourth proportional to 153,485.28, 211,728.60 and 105,655.86 is: 145,749.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,485.28 : 211,728.60 = 105,655.86 : x
  2. Step 2: Convert to fraction form
    153,485.28/211,728.60 = 105,655.86/x
  3. Step 3: Cross multiply
    153,485.28x = 211,728.60 × 105,655.86
  4. Step 4: Simplify right side
    153,485.28x = 22,370,367,319.60
  5. Step 5: Solve for x
    x = 22,370,367,319.60/153,485.28
  6. Step 6: Final answer
    x = 145,749.27

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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.