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Finding the Fourth Proportional to 70,123,453.90, 96,779,978.88 and 40,353,490.49

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Solution

The fourth proportional to 70,123,453.90, 96,779,978.88 and 40,353,490.49 is: 55,693,348.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,123,453.90 : 96,779,978.88 = 40,353,490.49 : x
  2. Step 2: Convert to fraction form
    70,123,453.90/96,779,978.88 = 40,353,490.49/x
  3. Step 3: Cross multiply
    70,123,453.90x = 96,779,978.88 × 40,353,490.49
  4. Step 4: Simplify right side
    70,123,453.90x = 3,905,409,956,872,580.50
  5. Step 5: Solve for x
    x = 3,905,409,956,872,580.50/70,123,453.90
  6. Step 6: Final answer
    x = 55,693,348.51

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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.