Home / 128,726,528.80-193,089,793.20-74,306,970.40

Finding the Fourth Proportional to 128,726,528.80, 193,089,793.20 and 74,306,970.40

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Solution

The fourth proportional to 128,726,528.80, 193,089,793.20 and 74,306,970.40 is: 111,460,455.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,726,528.80 : 193,089,793.20 = 74,306,970.40 : x
  2. Step 2: Convert to fraction form
    128,726,528.80/193,089,793.20 = 74,306,970.40/x
  3. Step 3: Cross multiply
    128,726,528.80x = 193,089,793.20 × 74,306,970.40
  4. Step 4: Simplify right side
    128,726,528.80x = 14,347,917,547,854,522
  5. Step 5: Solve for x
    x = 14,347,917,547,854,522/128,726,528.80
  6. Step 6: Final answer
    x = 111,460,455.60

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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.