Home / 112,955,921.20-169,433,881.80-78,518,544.40

Finding the Fourth Proportional to 112,955,921.20, 169,433,881.80 and 78,518,544.40

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Solution

The fourth proportional to 112,955,921.20, 169,433,881.80 and 78,518,544.40 is: 117,777,816.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,955,921.20 : 169,433,881.80 = 78,518,544.40 : x
  2. Step 2: Convert to fraction form
    112,955,921.20/169,433,881.80 = 78,518,544.40/x
  3. Step 3: Cross multiply
    112,955,921.20x = 169,433,881.80 × 78,518,544.40
  4. Step 4: Simplify right side
    112,955,921.20x = 13,303,701,770,977,654
  5. Step 5: Solve for x
    x = 13,303,701,770,977,654/112,955,921.20
  6. Step 6: Final answer
    x = 117,777,816.60

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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.