Home / 142,279.02-212,121.77-138,643.74

Finding the Fourth Proportional to 142,279.02, 212,121.77 and 138,643.74

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Solution

The fourth proportional to 142,279.02, 212,121.77 and 138,643.74 is: 206,701.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,279.02 : 212,121.77 = 138,643.74 : x
  2. Step 2: Convert to fraction form
    142,279.02/212,121.77 = 138,643.74/x
  3. Step 3: Cross multiply
    142,279.02x = 212,121.77 × 138,643.74
  4. Step 4: Simplify right side
    142,279.02x = 29,409,354,835.00
  5. Step 5: Solve for x
    x = 29,409,354,835.00/142,279.02
  6. Step 6: Final answer
    x = 206,701.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.