Home / 85,831.10-128,746.65-84,373.10

Finding the Fourth Proportional to 85,831.10, 128,746.65 and 84,373.10

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Solution

The fourth proportional to 85,831.10, 128,746.65 and 84,373.10 is: 126,559.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,831.10 : 128,746.65 = 84,373.10 : x
  2. Step 2: Convert to fraction form
    85,831.10/128,746.65 = 84,373.10/x
  3. Step 3: Cross multiply
    85,831.10x = 128,746.65 × 84,373.10
  4. Step 4: Simplify right side
    85,831.10x = 10,862,753,975.12
  5. Step 5: Solve for x
    x = 10,862,753,975.12/85,831.10
  6. Step 6: Final answer
    x = 126,559.65

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Similar ratio
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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.