Home / 115,079.72-158,900.10-90,000.68

Finding the Fourth Proportional to 115,079.72, 158,900.10 and 90,000.68

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Solution

The fourth proportional to 115,079.72, 158,900.10 and 90,000.68 is: 124,271.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,079.72 : 158,900.10 = 90,000.68 : x
  2. Step 2: Convert to fraction form
    115,079.72/158,900.10 = 90,000.68/x
  3. Step 3: Cross multiply
    115,079.72x = 158,900.10 × 90,000.68
  4. Step 4: Simplify right side
    115,079.72x = 14,301,117,052.07
  5. Step 5: Solve for x
    x = 14,301,117,052.07/115,079.72
  6. Step 6: Final answer
    x = 124,271.39

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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.