Home / 128,105,641.60-191,897,188.80-79,434,102.40

Finding the Fourth Proportional to 128,105,641.60, 191,897,188.80 and 79,434,102.40

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Solution

The fourth proportional to 128,105,641.60, 191,897,188.80 and 79,434,102.40 is: 118,989,146.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,105,641.60 : 191,897,188.80 = 79,434,102.40 : x
  2. Step 2: Convert to fraction form
    128,105,641.60/191,897,188.80 = 79,434,102.40/x
  3. Step 3: Cross multiply
    128,105,641.60x = 191,897,188.80 × 79,434,102.40
  4. Step 4: Simplify right side
    128,105,641.60x = 15,243,180,945,411,336
  5. Step 5: Solve for x
    x = 15,243,180,945,411,336/128,105,641.60
  6. Step 6: Final answer
    x = 118,989,146.42

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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.