Home / 85,430.64-128,158.22-26,271.30

Finding the Fourth Proportional to 85,430.64, 128,158.22 and 26,271.30

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Solution

The fourth proportional to 85,430.64, 128,158.22 and 26,271.30 is: 39,410.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,430.64 : 128,158.22 = 26,271.30 : x
  2. Step 2: Convert to fraction form
    85,430.64/128,158.22 = 26,271.30/x
  3. Step 3: Cross multiply
    85,430.64x = 128,158.22 × 26,271.30
  4. Step 4: Simplify right side
    85,430.64x = 3,366,883,045.09
  5. Step 5: Solve for x
    x = 3,366,883,045.09/85,430.64
  6. Step 6: Final answer
    x = 39,410.72

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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.