Home / 145,839.50-201,258.65-78,771.50

Finding the Fourth Proportional to 145,839.50, 201,258.65 and 78,771.50

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Solution

The fourth proportional to 145,839.50, 201,258.65 and 78,771.50 is: 108,704.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,839.50 : 201,258.65 = 78,771.50 : x
  2. Step 2: Convert to fraction form
    145,839.50/201,258.65 = 78,771.50/x
  3. Step 3: Cross multiply
    145,839.50x = 201,258.65 × 78,771.50
  4. Step 4: Simplify right side
    145,839.50x = 15,853,445,748.48
  5. Step 5: Solve for x
    x = 15,853,445,748.48/145,839.50
  6. Step 6: Final answer
    x = 108,704.75

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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.