Home / 85,612.32-118,150.80-47,890.08

Finding the Fourth Proportional to 85,612.32, 118,150.80 and 47,890.08

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Solution

The fourth proportional to 85,612.32, 118,150.80 and 47,890.08 is: 66,091.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,612.32 : 118,150.80 = 47,890.08 : x
  2. Step 2: Convert to fraction form
    85,612.32/118,150.80 = 47,890.08/x
  3. Step 3: Cross multiply
    85,612.32x = 118,150.80 × 47,890.08
  4. Step 4: Simplify right side
    85,612.32x = 5,658,251,264.06
  5. Step 5: Solve for x
    x = 5,658,251,264.06/85,612.32
  6. Step 6: Final answer
    x = 66,091.55

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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.