Home / 213,931,298.18-320,927,416.78-66,391,605.30

Finding the Fourth Proportional to 213,931,298.18, 320,927,416.78 and 66,391,605.30

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Solution

The fourth proportional to 213,931,298.18, 320,927,416.78 and 66,391,605.30 is: 99,596,863.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,931,298.18 : 320,927,416.78 = 66,391,605.30 : x
  2. Step 2: Convert to fraction form
    213,931,298.18/320,927,416.78 = 66,391,605.30/x
  3. Step 3: Cross multiply
    213,931,298.18x = 320,927,416.78 × 66,391,605.30
  4. Step 4: Simplify right side
    213,931,298.18x = 21,306,886,384,806,356
  5. Step 5: Solve for x
    x = 21,306,886,384,806,356/213,931,298.18
  6. Step 6: Final answer
    x = 99,596,863.88

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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.