Home / 153,928.89-212,457.30-90,287.19

Finding the Fourth Proportional to 153,928.89, 212,457.30 and 90,287.19

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Solution

The fourth proportional to 153,928.89, 212,457.30 and 90,287.19 is: 124,617.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,928.89 : 212,457.30 = 90,287.19 : x
  2. Step 2: Convert to fraction form
    153,928.89/212,457.30 = 90,287.19/x
  3. Step 3: Cross multiply
    153,928.89x = 212,457.30 × 90,287.19
  4. Step 4: Simplify right side
    153,928.89x = 19,182,172,611.99
  5. Step 5: Solve for x
    x = 19,182,172,611.99/153,928.89
  6. Step 6: Final answer
    x = 124,617.10

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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.