Home / 90,840.30-136,260.45-87,000.90

Finding the Fourth Proportional to 90,840.30, 136,260.45 and 87,000.90

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Solution

The fourth proportional to 90,840.30, 136,260.45 and 87,000.90 is: 130,501.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,840.30 : 136,260.45 = 87,000.90 : x
  2. Step 2: Convert to fraction form
    90,840.30/136,260.45 = 87,000.90/x
  3. Step 3: Cross multiply
    90,840.30x = 136,260.45 × 87,000.90
  4. Step 4: Simplify right side
    90,840.30x = 11,854,781,784.41
  5. Step 5: Solve for x
    x = 11,854,781,784.41/90,840.30
  6. Step 6: Final answer
    x = 130,501.35

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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.