Home / 147,709.96-221,312.86-81,205.80

Finding the Fourth Proportional to 147,709.96, 221,312.86 and 81,205.80

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Solution

The fourth proportional to 147,709.96, 221,312.86 and 81,205.80 is: 121,670.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,709.96 : 221,312.86 = 81,205.80 : x
  2. Step 2: Convert to fraction form
    147,709.96/221,312.86 = 81,205.80/x
  3. Step 3: Cross multiply
    147,709.96x = 221,312.86 × 81,205.80
  4. Step 4: Simplify right side
    147,709.96x = 17,971,887,846.59
  5. Step 5: Solve for x
    x = 17,971,887,846.59/147,709.96
  6. Step 6: Final answer
    x = 121,670.12

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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.