Home / 112,116.45-154,721.91-61,128.77

Finding the Fourth Proportional to 112,116.45, 154,721.91 and 61,128.77

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Solution

The fourth proportional to 112,116.45, 154,721.91 and 61,128.77 is: 84,358.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,116.45 : 154,721.91 = 61,128.77 : x
  2. Step 2: Convert to fraction form
    112,116.45/154,721.91 = 61,128.77/x
  3. Step 3: Cross multiply
    112,116.45x = 154,721.91 × 61,128.77
  4. Step 4: Simplify right side
    112,116.45x = 9,457,959,941.13
  5. Step 5: Solve for x
    x = 9,457,959,941.13/112,116.45
  6. Step 6: Final answer
    x = 84,358.36

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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.