Home / 100,319.14-138,442.98-56,708.18

Finding the Fourth Proportional to 100,319.14, 138,442.98 and 56,708.18

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Solution

The fourth proportional to 100,319.14, 138,442.98 and 56,708.18 is: 78,258.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,319.14 : 138,442.98 = 56,708.18 : x
  2. Step 2: Convert to fraction form
    100,319.14/138,442.98 = 56,708.18/x
  3. Step 3: Cross multiply
    100,319.14x = 138,442.98 × 56,708.18
  4. Step 4: Simplify right side
    100,319.14x = 7,850,849,429.58
  5. Step 5: Solve for x
    x = 7,850,849,429.58/100,319.14
  6. Step 6: Final answer
    x = 78,258.74

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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.