Home / 78,748,897.80-118,123,346.70-70,458,418.20

Finding the Fourth Proportional to 78,748,897.80, 118,123,346.70 and 70,458,418.20

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Solution

The fourth proportional to 78,748,897.80, 118,123,346.70 and 70,458,418.20 is: 105,687,627.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,748,897.80 : 118,123,346.70 = 70,458,418.20 : x
  2. Step 2: Convert to fraction form
    78,748,897.80/118,123,346.70 = 70,458,418.20/x
  3. Step 3: Cross multiply
    78,748,897.80x = 118,123,346.70 × 70,458,418.20
  4. Step 4: Simplify right side
    78,748,897.80x = 8,322,784,160,972,191
  5. Step 5: Solve for x
    x = 8,322,784,160,972,191/78,748,897.80
  6. Step 6: Final answer
    x = 105,687,627.30

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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.