Home / 85,820.10-128,730.15-74,010.30

Finding the Fourth Proportional to 85,820.10, 128,730.15 and 74,010.30

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Solution

The fourth proportional to 85,820.10, 128,730.15 and 74,010.30 is: 111,015.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,820.10 : 128,730.15 = 74,010.30 : x
  2. Step 2: Convert to fraction form
    85,820.10/128,730.15 = 74,010.30/x
  3. Step 3: Cross multiply
    85,820.10x = 128,730.15 × 74,010.30
  4. Step 4: Simplify right side
    85,820.10x = 9,527,357,020.55
  5. Step 5: Solve for x
    x = 9,527,357,020.55/85,820.10
  6. Step 6: Final answer
    x = 111,015.45

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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.