Home / 78,897,812.40-118,346,718.60-70,331,770.80

Finding the Fourth Proportional to 78,897,812.40, 118,346,718.60 and 70,331,770.80

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Solution

The fourth proportional to 78,897,812.40, 118,346,718.60 and 70,331,770.80 is: 105,497,656.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,897,812.40 : 118,346,718.60 = 70,331,770.80 : x
  2. Step 2: Convert to fraction form
    78,897,812.40/118,346,718.60 = 70,331,770.80/x
  3. Step 3: Cross multiply
    78,897,812.40x = 118,346,718.60 × 70,331,770.80
  4. Step 4: Simplify right side
    78,897,812.40x = 8,323,534,287,507,296
  5. Step 5: Solve for x
    x = 8,323,534,287,507,296/78,897,812.40
  6. Step 6: Final answer
    x = 105,497,656.20

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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.