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Finding the Fourth Proportional to 147,039.40, 220,559.10 and 84,831.40

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Solution

The fourth proportional to 147,039.40, 220,559.10 and 84,831.40 is: 127,247.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,039.40 : 220,559.10 = 84,831.40 : x
  2. Step 2: Convert to fraction form
    147,039.40/220,559.10 = 84,831.40/x
  3. Step 3: Cross multiply
    147,039.40x = 220,559.10 × 84,831.40
  4. Step 4: Simplify right side
    147,039.40x = 18,710,337,235.74
  5. Step 5: Solve for x
    x = 18,710,337,235.74/147,039.40
  6. Step 6: Final answer
    x = 127,247.10

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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.