Home / 86,605.20-129,907.80-42,209.10

Finding the Fourth Proportional to 86,605.20, 129,907.80 and 42,209.10

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Solution

The fourth proportional to 86,605.20, 129,907.80 and 42,209.10 is: 63,313.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,605.20 : 129,907.80 = 42,209.10 : x
  2. Step 2: Convert to fraction form
    86,605.20/129,907.80 = 42,209.10/x
  3. Step 3: Cross multiply
    86,605.20x = 129,907.80 × 42,209.10
  4. Step 4: Simplify right side
    86,605.20x = 5,483,291,320.98
  5. Step 5: Solve for x
    x = 5,483,291,320.98/86,605.20
  6. Step 6: Final answer
    x = 63,313.65

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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.