Home / 142,113.20-212,999.90-66,109.07

Finding the Fourth Proportional to 142,113.20, 212,999.90 and 66,109.07

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Solution

The fourth proportional to 142,113.20, 212,999.90 and 66,109.07 is: 99,084.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,113.20 : 212,999.90 = 66,109.07 : x
  2. Step 2: Convert to fraction form
    142,113.20/212,999.90 = 66,109.07/x
  3. Step 3: Cross multiply
    142,113.20x = 212,999.90 × 66,109.07
  4. Step 4: Simplify right side
    142,113.20x = 14,081,225,501.05
  5. Step 5: Solve for x
    x = 14,081,225,501.05/142,113.20
  6. Step 6: Final answer
    x = 99,084.57

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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.