Home / 130,442.88-179,968-90,142.16

Finding the Fourth Proportional to 130,442.88, 179,968 and 90,142.16

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Solution

The fourth proportional to 130,442.88, 179,968 and 90,142.16 is: 124,366.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,442.88 : 179,968 = 90,142.16 : x
  2. Step 2: Convert to fraction form
    130,442.88/179,968 = 90,142.16/x
  3. Step 3: Cross multiply
    130,442.88x = 179,968 × 90,142.16
  4. Step 4: Simplify right side
    130,442.88x = 16,222,704,250.88
  5. Step 5: Solve for x
    x = 16,222,704,250.88/130,442.88
  6. Step 6: Final answer
    x = 124,366.35

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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.