Home / 86,557.08-129,840.42-42,221.64

Finding the Fourth Proportional to 86,557.08, 129,840.42 and 42,221.64

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Solution

The fourth proportional to 86,557.08, 129,840.42 and 42,221.64 is: 63,334.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,557.08 : 129,840.42 = 42,221.64 : x
  2. Step 2: Convert to fraction form
    86,557.08/129,840.42 = 42,221.64/x
  3. Step 3: Cross multiply
    86,557.08x = 129,840.42 × 42,221.64
  4. Step 4: Simplify right side
    86,557.08x = 5,482,075,470.69
  5. Step 5: Solve for x
    x = 5,482,075,470.69/86,557.08
  6. Step 6: Final answer
    x = 63,334.80

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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.