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Finding the Fourth Proportional to 123,897.70, 170,980.95 and 70,181.38

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Solution

The fourth proportional to 123,897.70, 170,980.95 and 70,181.38 is: 96,851.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,897.70 : 170,980.95 = 70,181.38 : x
  2. Step 2: Convert to fraction form
    123,897.70/170,980.95 = 70,181.38/x
  3. Step 3: Cross multiply
    123,897.70x = 170,980.95 × 70,181.38
  4. Step 4: Simplify right side
    123,897.70x = 11,999,679,024.71
  5. Step 5: Solve for x
    x = 11,999,679,024.71/123,897.70
  6. Step 6: Final answer
    x = 96,851.51

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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.