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Finding the Fourth Proportional to 86,955,342.15, 121,916,638.05 and 86,955,342.15

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Solution

The fourth proportional to 86,955,342.15, 121,916,638.05 and 86,955,342.15 is: 121,916,638.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,955,342.15 : 121,916,638.05 = 86,955,342.15 : x
  2. Step 2: Convert to fraction form
    86,955,342.15/121,916,638.05 = 86,955,342.15/x
  3. Step 3: Cross multiply
    86,955,342.15x = 121,916,638.05 × 86,955,342.15
  4. Step 4: Simplify right side
    86,955,342.15x = 10,601,302,975,415,460
  5. Step 5: Solve for x
    x = 10,601,302,975,415,460/86,955,342.15
  6. Step 6: Final answer
    x = 121,916,638.05

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.