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Finding the Fourth Proportional to 212,422.99, 318,831.59 and 107,315.77

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Solution

The fourth proportional to 212,422.99, 318,831.59 and 107,315.77 is: 161,073.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,422.99 : 318,831.59 = 107,315.77 : x
  2. Step 2: Convert to fraction form
    212,422.99/318,831.59 = 107,315.77/x
  3. Step 3: Cross multiply
    212,422.99x = 318,831.59 × 107,315.77
  4. Step 4: Simplify right side
    212,422.99x = 34,215,657,581.17
  5. Step 5: Solve for x
    x = 34,215,657,581.17/212,422.99
  6. Step 6: Final answer
    x = 161,073.23

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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.