Home / 86,538.24-129,807.36-31,132.80

Finding the Fourth Proportional to 86,538.24, 129,807.36 and 31,132.80

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Solution

The fourth proportional to 86,538.24, 129,807.36 and 31,132.80 is: 46,699.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,538.24 : 129,807.36 = 31,132.80 : x
  2. Step 2: Convert to fraction form
    86,538.24/129,807.36 = 31,132.80/x
  3. Step 3: Cross multiply
    86,538.24x = 129,807.36 × 31,132.80
  4. Step 4: Simplify right side
    86,538.24x = 4,041,266,577.41
  5. Step 5: Solve for x
    x = 4,041,266,577.41/86,538.24
  6. Step 6: Final answer
    x = 46,699.20

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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.