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Finding the Fourth Proportional to 115,940.71, 160,011.93 and 70,645.51

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Solution

The fourth proportional to 115,940.71, 160,011.93 and 70,645.51 is: 97,499.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,940.71 : 160,011.93 = 70,645.51 : x
  2. Step 2: Convert to fraction form
    115,940.71/160,011.93 = 70,645.51/x
  3. Step 3: Cross multiply
    115,940.71x = 160,011.93 × 70,645.51
  4. Step 4: Simplify right side
    115,940.71x = 11,304,124,400.93
  5. Step 5: Solve for x
    x = 11,304,124,400.93/115,940.71
  6. Step 6: Final answer
    x = 97,499.18

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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.