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Finding the Fourth Proportional to 84,969.42, 128,029.67 and 70,502.40

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Solution

The fourth proportional to 84,969.42, 128,029.67 and 70,502.40 is: 106,231.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,969.42 : 128,029.67 = 70,502.40 : x
  2. Step 2: Convert to fraction form
    84,969.42/128,029.67 = 70,502.40/x
  3. Step 3: Cross multiply
    84,969.42x = 128,029.67 × 70,502.40
  4. Step 4: Simplify right side
    84,969.42x = 9,026,398,653.70
  5. Step 5: Solve for x
    x = 9,026,398,653.70/84,969.42
  6. Step 6: Final answer
    x = 106,231.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.