Home / 85,340.43-128,024.01-69,507.36

Finding the Fourth Proportional to 85,340.43, 128,024.01 and 69,507.36

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Solution

The fourth proportional to 85,340.43, 128,024.01 and 69,507.36 is: 104,271.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,340.43 : 128,024.01 = 69,507.36 : x
  2. Step 2: Convert to fraction form
    85,340.43/128,024.01 = 69,507.36/x
  3. Step 3: Cross multiply
    85,340.43x = 128,024.01 × 69,507.36
  4. Step 4: Simplify right side
    85,340.43x = 8,898,610,951.71
  5. Step 5: Solve for x
    x = 8,898,610,951.71/85,340.43
  6. Step 6: Final answer
    x = 104,271.93

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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.