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Finding the Fourth Proportional to 123,782.54, 170,823.95 and 70,066.40

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Solution

The fourth proportional to 123,782.54, 170,823.95 and 70,066.40 is: 96,693.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,782.54 : 170,823.95 = 70,066.40 : x
  2. Step 2: Convert to fraction form
    123,782.54/170,823.95 = 70,066.40/x
  3. Step 3: Cross multiply
    123,782.54x = 170,823.95 × 70,066.40
  4. Step 4: Simplify right side
    123,782.54x = 11,969,018,005.83
  5. Step 5: Solve for x
    x = 11,969,018,005.83/123,782.54
  6. Step 6: Final answer
    x = 96,693.92

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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.