Home / 85,555.04-128,333.16-26,389.40

Finding the Fourth Proportional to 85,555.04, 128,333.16 and 26,389.40

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Solution

The fourth proportional to 85,555.04, 128,333.16 and 26,389.40 is: 39,584.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,555.04 : 128,333.16 = 26,389.40 : x
  2. Step 2: Convert to fraction form
    85,555.04/128,333.16 = 26,389.40/x
  3. Step 3: Cross multiply
    85,555.04x = 128,333.16 × 26,389.40
  4. Step 4: Simplify right side
    85,555.04x = 3,386,634,450.84
  5. Step 5: Solve for x
    x = 3,386,634,450.84/85,555.04
  6. Step 6: Final answer
    x = 39,584.28

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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.