Home / 145,931.50-201,385.74-78,863.50

Finding the Fourth Proportional to 145,931.50, 201,385.74 and 78,863.50

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Solution

The fourth proportional to 145,931.50, 201,385.74 and 78,863.50 is: 108,831.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,931.50 : 201,385.74 = 78,863.50 : x
  2. Step 2: Convert to fraction form
    145,931.50/201,385.74 = 78,863.50/x
  3. Step 3: Cross multiply
    145,931.50x = 201,385.74 × 78,863.50
  4. Step 4: Simplify right side
    145,931.50x = 15,881,984,306.49
  5. Step 5: Solve for x
    x = 15,881,984,306.49/145,931.50
  6. Step 6: Final answer
    x = 108,831.78

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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.