Home / 64,631.12-89,147.40-40,788.32

Finding the Fourth Proportional to 64,631.12, 89,147.40 and 40,788.32

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Solution

The fourth proportional to 64,631.12, 89,147.40 and 40,788.32 is: 56,260.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,631.12 : 89,147.40 = 40,788.32 : x
  2. Step 2: Convert to fraction form
    64,631.12/89,147.40 = 40,788.32/x
  3. Step 3: Cross multiply
    64,631.12x = 89,147.40 × 40,788.32
  4. Step 4: Simplify right side
    64,631.12x = 3,636,172,678.37
  5. Step 5: Solve for x
    x = 3,636,172,678.37/64,631.12
  6. Step 6: Final answer
    x = 56,260.40

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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.