Home / 212,390,515.10-318,604,456.31-64,871,378.79

Finding the Fourth Proportional to 212,390,515.10, 318,604,456.31 and 64,871,378.79

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Solution

The fourth proportional to 212,390,515.10, 318,604,456.31 and 64,871,378.79 is: 97,312,774.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,390,515.10 : 318,604,456.31 = 64,871,378.79 : x
  2. Step 2: Convert to fraction form
    212,390,515.10/318,604,456.31 = 64,871,378.79/x
  3. Step 3: Cross multiply
    212,390,515.10x = 318,604,456.31 × 64,871,378.79
  4. Step 4: Simplify right side
    212,390,515.10x = 20,668,310,369,143,660
  5. Step 5: Solve for x
    x = 20,668,310,369,143,660/212,390,515.10
  6. Step 6: Final answer
    x = 97,312,774.82

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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.