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Finding the Fourth Proportional to 154,313.16, 212,866.41 and 89,775.15

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Solution

The fourth proportional to 154,313.16, 212,866.41 and 89,775.15 is: 123,839.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,313.16 : 212,866.41 = 89,775.15 : x
  2. Step 2: Convert to fraction form
    154,313.16/212,866.41 = 89,775.15/x
  3. Step 3: Cross multiply
    154,313.16x = 212,866.41 × 89,775.15
  4. Step 4: Simplify right side
    154,313.16x = 19,110,113,887.71
  5. Step 5: Solve for x
    x = 19,110,113,887.71/154,313.16
  6. Step 6: Final answer
    x = 123,839.82

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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.