Home / 100,830.40-139,337.76-75,636.16

Finding the Fourth Proportional to 100,830.40, 139,337.76 and 75,636.16

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Solution

The fourth proportional to 100,830.40, 139,337.76 and 75,636.16 is: 104,521.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,830.40 : 139,337.76 = 75,636.16 : x
  2. Step 2: Convert to fraction form
    100,830.40/139,337.76 = 75,636.16/x
  3. Step 3: Cross multiply
    100,830.40x = 139,337.76 × 75,636.16
  4. Step 4: Simplify right side
    100,830.40x = 10,538,973,109.40
  5. Step 5: Solve for x
    x = 10,538,973,109.40/100,830.40
  6. Step 6: Final answer
    x = 104,521.78

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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.