Home / 153,728.02-212,125.80-85,729.06

Finding the Fourth Proportional to 153,728.02, 212,125.80 and 85,729.06

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Solution

The fourth proportional to 153,728.02, 212,125.80 and 85,729.06 is: 118,295.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,728.02 : 212,125.80 = 85,729.06 : x
  2. Step 2: Convert to fraction form
    153,728.02/212,125.80 = 85,729.06/x
  3. Step 3: Cross multiply
    153,728.02x = 212,125.80 × 85,729.06
  4. Step 4: Simplify right side
    153,728.02x = 18,185,345,435.75
  5. Step 5: Solve for x
    x = 18,185,345,435.75/153,728.02
  6. Step 6: Final answer
    x = 118,295.58

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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.