Home / 90,088.65-135,149.45-30,111.45

Finding the Fourth Proportional to 90,088.65, 135,149.45 and 30,111.45

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Solution

The fourth proportional to 90,088.65, 135,149.45 and 30,111.45 is: 45,172.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,088.65 : 135,149.45 = 30,111.45 : x
  2. Step 2: Convert to fraction form
    90,088.65/135,149.45 = 30,111.45/x
  3. Step 3: Cross multiply
    90,088.65x = 135,149.45 × 30,111.45
  4. Step 4: Simplify right side
    90,088.65x = 4,069,545,755.65
  5. Step 5: Solve for x
    x = 4,069,545,755.65/90,088.65
  6. Step 6: Final answer
    x = 45,172.68

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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.