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Finding the Fourth Proportional to 162,073.80, 243,329.40 and 128,831.40

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Solution

The fourth proportional to 162,073.80, 243,329.40 and 128,831.40 is: 193,420.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,073.80 : 243,329.40 = 128,831.40 : x
  2. Step 2: Convert to fraction form
    162,073.80/243,329.40 = 128,831.40/x
  3. Step 3: Cross multiply
    162,073.80x = 243,329.40 × 128,831.40
  4. Step 4: Simplify right side
    162,073.80x = 31,348,467,263.16
  5. Step 5: Solve for x
    x = 31,348,467,263.16/162,073.80
  6. Step 6: Final answer
    x = 193,420.94

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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.