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Finding the Fourth Proportional to 128,278.40, 192,417.60 and 97,174.40

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Solution

The fourth proportional to 128,278.40, 192,417.60 and 97,174.40 is: 145,761.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,278.40 : 192,417.60 = 97,174.40 : x
  2. Step 2: Convert to fraction form
    128,278.40/192,417.60 = 97,174.40/x
  3. Step 3: Cross multiply
    128,278.40x = 192,417.60 × 97,174.40
  4. Step 4: Simplify right side
    128,278.40x = 18,698,064,829.44
  5. Step 5: Solve for x
    x = 18,698,064,829.44/128,278.40
  6. Step 6: Final answer
    x = 145,761.60

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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.