Home / 100,935.15-139,292.12-55,612.47

Finding the Fourth Proportional to 100,935.15, 139,292.12 and 55,612.47

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Solution

The fourth proportional to 100,935.15, 139,292.12 and 55,612.47 is: 76,746.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,935.15 : 139,292.12 = 55,612.47 : x
  2. Step 2: Convert to fraction form
    100,935.15/139,292.12 = 55,612.47/x
  3. Step 3: Cross multiply
    100,935.15x = 139,292.12 × 55,612.47
  4. Step 4: Simplify right side
    100,935.15x = 7,746,379,506.11
  5. Step 5: Solve for x
    x = 7,746,379,506.11/100,935.15
  6. Step 6: Final answer
    x = 76,746.11

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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.