Home / 85,465.12-128,117.04-30,030.88

Finding the Fourth Proportional to 85,465.12, 128,117.04 and 30,030.88

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Solution

The fourth proportional to 85,465.12, 128,117.04 and 30,030.88 is: 45,017.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,465.12 : 128,117.04 = 30,030.88 : x
  2. Step 2: Convert to fraction form
    85,465.12/128,117.04 = 30,030.88/x
  3. Step 3: Cross multiply
    85,465.12x = 128,117.04 × 30,030.88
  4. Step 4: Simplify right side
    85,465.12x = 3,847,467,454.20
  5. Step 5: Solve for x
    x = 3,847,467,454.20/85,465.12
  6. Step 6: Final answer
    x = 45,017.98

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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.