Home / 115,421.24-159,284-72,402.55

Finding the Fourth Proportional to 115,421.24, 159,284 and 72,402.55

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Solution

The fourth proportional to 115,421.24, 159,284 and 72,402.55 is: 99,917.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,421.24 : 159,284 = 72,402.55 : x
  2. Step 2: Convert to fraction form
    115,421.24/159,284 = 72,402.55/x
  3. Step 3: Cross multiply
    115,421.24x = 159,284 × 72,402.55
  4. Step 4: Simplify right side
    115,421.24x = 11,532,567,774.20
  5. Step 5: Solve for x
    x = 11,532,567,774.20/115,421.24
  6. Step 6: Final answer
    x = 99,917.21

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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.