Home / 85,547.40-128,126.70-54,054.60

Finding the Fourth Proportional to 85,547.40, 128,126.70 and 54,054.60

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Solution

The fourth proportional to 85,547.40, 128,126.70 and 54,054.60 is: 80,959.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,547.40 : 128,126.70 = 54,054.60 : x
  2. Step 2: Convert to fraction form
    85,547.40/128,126.70 = 54,054.60/x
  3. Step 3: Cross multiply
    85,547.40x = 128,126.70 × 54,054.60
  4. Step 4: Simplify right side
    85,547.40x = 6,925,837,517.82
  5. Step 5: Solve for x
    x = 6,925,837,517.82/85,547.40
  6. Step 6: Final answer
    x = 80,959.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.