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Finding the Fourth Proportional to 112,841.77, 155,724.71 and 81,070.13

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Solution

The fourth proportional to 112,841.77, 155,724.71 and 81,070.13 is: 111,878.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,841.77 : 155,724.71 = 81,070.13 : x
  2. Step 2: Convert to fraction form
    112,841.77/155,724.71 = 81,070.13/x
  3. Step 3: Cross multiply
    112,841.77x = 155,724.71 × 81,070.13
  4. Step 4: Simplify right side
    112,841.77x = 12,624,622,483.91
  5. Step 5: Solve for x
    x = 12,624,622,483.91/112,841.77
  6. Step 6: Final answer
    x = 111,878.98

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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.