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Finding the Fourth Proportional to 123,838.50, 170,897.80 and 70,133.98

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Solution

The fourth proportional to 123,838.50, 170,897.80 and 70,133.98 is: 96,785.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,838.50 : 170,897.80 = 70,133.98 : x
  2. Step 2: Convert to fraction form
    123,838.50/170,897.80 = 70,133.98/x
  3. Step 3: Cross multiply
    123,838.50x = 170,897.80 × 70,133.98
  4. Step 4: Simplify right side
    123,838.50x = 11,985,742,887.24
  5. Step 5: Solve for x
    x = 11,985,742,887.24/123,838.50
  6. Step 6: Final answer
    x = 96,785.27

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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.