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Finding the Fourth Proportional to 213,496.39, 319,985.65 and 156,810.89

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Solution

The fourth proportional to 213,496.39, 319,985.65 and 156,810.89 is: 235,026.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,496.39 : 319,985.65 = 156,810.89 : x
  2. Step 2: Convert to fraction form
    213,496.39/319,985.65 = 156,810.89/x
  3. Step 3: Cross multiply
    213,496.39x = 319,985.65 × 156,810.89
  4. Step 4: Simplify right side
    213,496.39x = 50,177,232,571.77
  5. Step 5: Solve for x
    x = 50,177,232,571.77/213,496.39
  6. Step 6: Final answer
    x = 235,026.14

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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.