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Finding the Fourth Proportional to 89,455.20, 125,421.60 and 89,455.20

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Solution

The fourth proportional to 89,455.20, 125,421.60 and 89,455.20 is: 125,421.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,455.20 : 125,421.60 = 89,455.20 : x
  2. Step 2: Convert to fraction form
    89,455.20/125,421.60 = 89,455.20/x
  3. Step 3: Cross multiply
    89,455.20x = 125,421.60 × 89,455.20
  4. Step 4: Simplify right side
    89,455.20x = 11,219,614,312.32
  5. Step 5: Solve for x
    x = 11,219,614,312.32/89,455.20
  6. Step 6: Final answer
    x = 125,421.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.