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Finding the Fourth Proportional to 138,660,978.07, 191,349,811.16 and 76,779,988.03

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Solution

The fourth proportional to 138,660,978.07, 191,349,811.16 and 76,779,988.03 is: 105,955,088.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,660,978.07 : 191,349,811.16 = 76,779,988.03 : x
  2. Step 2: Convert to fraction form
    138,660,978.07/191,349,811.16 = 76,779,988.03/x
  3. Step 3: Cross multiply
    138,660,978.07x = 191,349,811.16 × 76,779,988.03
  4. Step 4: Simplify right side
    138,660,978.07x = 14,691,836,209,450,812
  5. Step 5: Solve for x
    x = 14,691,836,209,450,812/138,660,978.07
  6. Step 6: Final answer
    x = 105,955,088.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.