Home / 115,136.80-158,888.64-64,836.16

Finding the Fourth Proportional to 115,136.80, 158,888.64 and 64,836.16

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Solution

The fourth proportional to 115,136.80, 158,888.64 and 64,836.16 is: 89,473.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,136.80 : 158,888.64 = 64,836.16 : x
  2. Step 2: Convert to fraction form
    115,136.80/158,888.64 = 64,836.16/x
  3. Step 3: Cross multiply
    115,136.80x = 158,888.64 × 64,836.16
  4. Step 4: Simplify right side
    115,136.80x = 10,301,729,285.22
  5. Step 5: Solve for x
    x = 10,301,729,285.22/115,136.80
  6. Step 6: Final answer
    x = 89,473.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.