Home / 128,345.42-177,045.58-74,624.50

Finding the Fourth Proportional to 128,345.42, 177,045.58 and 74,624.50

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Solution

The fourth proportional to 128,345.42, 177,045.58 and 74,624.50 is: 102,940.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,345.42 : 177,045.58 = 74,624.50 : x
  2. Step 2: Convert to fraction form
    128,345.42/177,045.58 = 74,624.50/x
  3. Step 3: Cross multiply
    128,345.42x = 177,045.58 × 74,624.50
  4. Step 4: Simplify right side
    128,345.42x = 13,211,937,884.71
  5. Step 5: Solve for x
    x = 13,211,937,884.71/128,345.42
  6. Step 6: Final answer
    x = 102,940.47

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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.