Home / 112,971.51-156,062.90-90,280.78

Finding the Fourth Proportional to 112,971.51, 156,062.90 and 90,280.78

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Solution

The fourth proportional to 112,971.51, 156,062.90 and 90,280.78 is: 124,717.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,971.51 : 156,062.90 = 90,280.78 : x
  2. Step 2: Convert to fraction form
    112,971.51/156,062.90 = 90,280.78/x
  3. Step 3: Cross multiply
    112,971.51x = 156,062.90 × 90,280.78
  4. Step 4: Simplify right side
    112,971.51x = 14,089,480,176.61
  5. Step 5: Solve for x
    x = 14,089,480,176.61/112,971.51
  6. Step 6: Final answer
    x = 124,717.11

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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.