Home / 112,970.21-155,893.63-61,981.79

Finding the Fourth Proportional to 112,970.21, 155,893.63 and 61,981.79

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Solution

The fourth proportional to 112,970.21, 155,893.63 and 61,981.79 is: 85,531.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,970.21 : 155,893.63 = 61,981.79 : x
  2. Step 2: Convert to fraction form
    112,970.21/155,893.63 = 61,981.79/x
  3. Step 3: Cross multiply
    112,970.21x = 155,893.63 × 61,981.79
  4. Step 4: Simplify right side
    112,970.21x = 9,662,565,927.09
  5. Step 5: Solve for x
    x = 9,662,565,927.09/112,970.21
  6. Step 6: Final answer
    x = 85,531.98

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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.