Home / 161,928-223,461.02-90,312.65

Finding the Fourth Proportional to 161,928, 223,461.02 and 90,312.65

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Solution

The fourth proportional to 161,928, 223,461.02 and 90,312.65 is: 124,631.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,928 : 223,461.02 = 90,312.65 : x
  2. Step 2: Convert to fraction form
    161,928/223,461.02 = 90,312.65/x
  3. Step 3: Cross multiply
    161,928x = 223,461.02 × 90,312.65
  4. Step 4: Simplify right side
    161,928x = 20,181,355,319.03
  5. Step 5: Solve for x
    x = 20,181,355,319.03/161,928
  6. Step 6: Final answer
    x = 124,631.66

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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.