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Finding the Fourth Proportional to 112,897.88, 155,800.88 and 61,915.28

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Solution

The fourth proportional to 112,897.88, 155,800.88 and 61,915.28 is: 85,444.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,897.88 : 155,800.88 = 61,915.28 : x
  2. Step 2: Convert to fraction form
    112,897.88/155,800.88 = 61,915.28/x
  3. Step 3: Cross multiply
    112,897.88x = 155,800.88 × 61,915.28
  4. Step 4: Simplify right side
    112,897.88x = 9,646,455,109.45
  5. Step 5: Solve for x
    x = 9,646,455,109.45/112,897.88
  6. Step 6: Final answer
    x = 85,444.08

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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.