Home / 85,457.16-128,138.76-26,276.40

Finding the Fourth Proportional to 85,457.16, 128,138.76 and 26,276.40

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Solution

The fourth proportional to 85,457.16, 128,138.76 and 26,276.40 is: 39,400.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,457.16 : 128,138.76 = 26,276.40 : x
  2. Step 2: Convert to fraction form
    85,457.16/128,138.76 = 26,276.40/x
  3. Step 3: Cross multiply
    85,457.16x = 128,138.76 × 26,276.40
  4. Step 4: Simplify right side
    85,457.16x = 3,367,025,313.26
  5. Step 5: Solve for x
    x = 3,367,025,313.26/85,457.16
  6. Step 6: Final answer
    x = 39,400.15

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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.