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Finding the Fourth Proportional to 128,031.48, 176,705.01 and 74,361.42

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Solution

The fourth proportional to 128,031.48, 176,705.01 and 74,361.42 is: 102,631.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,031.48 : 176,705.01 = 74,361.42 : x
  2. Step 2: Convert to fraction form
    128,031.48/176,705.01 = 74,361.42/x
  3. Step 3: Cross multiply
    128,031.48x = 176,705.01 × 74,361.42
  4. Step 4: Simplify right side
    128,031.48x = 13,140,035,464.71
  5. Step 5: Solve for x
    x = 13,140,035,464.71/128,031.48
  6. Step 6: Final answer
    x = 102,631.29

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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.