Home / 85,702.08-128,554.24-30,259.20

Finding the Fourth Proportional to 85,702.08, 128,554.24 and 30,259.20

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Solution

The fourth proportional to 85,702.08, 128,554.24 and 30,259.20 is: 45,389.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,702.08 : 128,554.24 = 30,259.20 : x
  2. Step 2: Convert to fraction form
    85,702.08/128,554.24 = 30,259.20/x
  3. Step 3: Cross multiply
    85,702.08x = 128,554.24 × 30,259.20
  4. Step 4: Simplify right side
    85,702.08x = 3,889,948,459.01
  5. Step 5: Solve for x
    x = 3,889,948,459.01/85,702.08
  6. Step 6: Final answer
    x = 45,389.20

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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.