Home / 145,281.36-218,250.11-86,155.82

Finding the Fourth Proportional to 145,281.36, 218,250.11 and 86,155.82

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Solution

The fourth proportional to 145,281.36, 218,250.11 and 86,155.82 is: 129,428.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,281.36 : 218,250.11 = 86,155.82 : x
  2. Step 2: Convert to fraction form
    145,281.36/218,250.11 = 86,155.82/x
  3. Step 3: Cross multiply
    145,281.36x = 218,250.11 × 86,155.82
  4. Step 4: Simplify right side
    145,281.36x = 18,803,515,670.11
  5. Step 5: Solve for x
    x = 18,803,515,670.11/145,281.36
  6. Step 6: Final answer
    x = 129,428.27

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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.