Home / 100,839.16-139,145.34-58,397.32

Finding the Fourth Proportional to 100,839.16, 139,145.34 and 58,397.32

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Solution

The fourth proportional to 100,839.16, 139,145.34 and 58,397.32 is: 80,580.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,839.16 : 139,145.34 = 58,397.32 : x
  2. Step 2: Convert to fraction form
    100,839.16/139,145.34 = 58,397.32/x
  3. Step 3: Cross multiply
    100,839.16x = 139,145.34 × 58,397.32
  4. Step 4: Simplify right side
    100,839.16x = 8,125,714,946.49
  5. Step 5: Solve for x
    x = 8,125,714,946.49/100,839.16
  6. Step 6: Final answer
    x = 80,580.95

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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.