Home / 85,607.26-128,258.52-72,999.38

Finding the Fourth Proportional to 85,607.26, 128,258.52 and 72,999.38

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Solution

The fourth proportional to 85,607.26, 128,258.52 and 72,999.38 is: 109,369.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,607.26 : 128,258.52 = 72,999.38 : x
  2. Step 2: Convert to fraction form
    85,607.26/128,258.52 = 72,999.38/x
  3. Step 3: Cross multiply
    85,607.26x = 128,258.52 × 72,999.38
  4. Step 4: Simplify right side
    85,607.26x = 9,362,791,798.43
  5. Step 5: Solve for x
    x = 9,362,791,798.43/85,607.26
  6. Step 6: Final answer
    x = 109,369.13

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1.5x scale

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.