Home / 85,688.40-128,532.60-84,376.20

Finding the Fourth Proportional to 85,688.40, 128,532.60 and 84,376.20

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Solution

The fourth proportional to 85,688.40, 128,532.60 and 84,376.20 is: 126,564.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,688.40 : 128,532.60 = 84,376.20 : x
  2. Step 2: Convert to fraction form
    85,688.40/128,532.60 = 84,376.20/x
  3. Step 3: Cross multiply
    85,688.40x = 128,532.60 × 84,376.20
  4. Step 4: Simplify right side
    85,688.40x = 10,845,092,364.12
  5. Step 5: Solve for x
    x = 10,845,092,364.12/85,688.40
  6. Step 6: Final answer
    x = 126,564.30

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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.