Home / 137,427.21-189,646.25-77,000.40

Finding the Fourth Proportional to 137,427.21, 189,646.25 and 77,000.40

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Solution

The fourth proportional to 137,427.21, 189,646.25 and 77,000.40 is: 106,258.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,427.21 : 189,646.25 = 77,000.40 : x
  2. Step 2: Convert to fraction form
    137,427.21/189,646.25 = 77,000.40/x
  3. Step 3: Cross multiply
    137,427.21x = 189,646.25 × 77,000.40
  4. Step 4: Simplify right side
    137,427.21x = 14,602,836,723.50
  5. Step 5: Solve for x
    x = 14,602,836,723.50/137,427.21
  6. Step 6: Final answer
    x = 106,258.70

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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.