Home / 85,390.05-128,044.04-40,373.89

Finding the Fourth Proportional to 85,390.05, 128,044.04 and 40,373.89

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Solution

The fourth proportional to 85,390.05, 128,044.04 and 40,373.89 is: 60,541.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,390.05 : 128,044.04 = 40,373.89 : x
  2. Step 2: Convert to fraction form
    85,390.05/128,044.04 = 40,373.89/x
  3. Step 3: Cross multiply
    85,390.05x = 128,044.04 × 40,373.89
  4. Step 4: Simplify right side
    85,390.05x = 5,169,636,411.49
  5. Step 5: Solve for x
    x = 5,169,636,411.49/85,390.05
  6. Step 6: Final answer
    x = 60,541.44

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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.