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Finding the Fourth Proportional to 163,403.80, 245,105.70 and 74,830.30

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Solution

The fourth proportional to 163,403.80, 245,105.70 and 74,830.30 is: 112,245.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,403.80 : 245,105.70 = 74,830.30 : x
  2. Step 2: Convert to fraction form
    163,403.80/245,105.70 = 74,830.30/x
  3. Step 3: Cross multiply
    163,403.80x = 245,105.70 × 74,830.30
  4. Step 4: Simplify right side
    163,403.80x = 18,341,333,062.71
  5. Step 5: Solve for x
    x = 18,341,333,062.71/163,403.80
  6. Step 6: Final answer
    x = 112,245.45

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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.