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Finding the Fourth Proportional to 130,999.55, 196,480.13 and 64,421.78

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Solution

The fourth proportional to 130,999.55, 196,480.13 and 64,421.78 is: 96,623.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,999.55 : 196,480.13 = 64,421.78 : x
  2. Step 2: Convert to fraction form
    130,999.55/196,480.13 = 64,421.78/x
  3. Step 3: Cross multiply
    130,999.55x = 196,480.13 × 64,421.78
  4. Step 4: Simplify right side
    130,999.55x = 12,657,598,404.72
  5. Step 5: Solve for x
    x = 12,657,598,404.72/130,999.55
  6. Step 6: Final answer
    x = 96,623.22

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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.