Home / 128,126.95-190,875-122,369.74

Finding the Fourth Proportional to 128,126.95, 190,875 and 122,369.74

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Solution

The fourth proportional to 128,126.95, 190,875 and 122,369.74 is: 182,298.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,126.95 : 190,875 = 122,369.74 : x
  2. Step 2: Convert to fraction form
    128,126.95/190,875 = 122,369.74/x
  3. Step 3: Cross multiply
    128,126.95x = 190,875 × 122,369.74
  4. Step 4: Simplify right side
    128,126.95x = 23,357,324,122.50
  5. Step 5: Solve for x
    x = 23,357,324,122.50/128,126.95
  6. Step 6: Final answer
    x = 182,298.29

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1.5x scale

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.