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Finding the Fourth Proportional to 126,971, 175,219.98 and 70,391

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Solution

The fourth proportional to 126,971, 175,219.98 and 70,391 is: 97,139.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,971 : 175,219.98 = 70,391 : x
  2. Step 2: Convert to fraction form
    126,971/175,219.98 = 70,391/x
  3. Step 3: Cross multiply
    126,971x = 175,219.98 × 70,391
  4. Step 4: Simplify right side
    126,971x = 12,333,909,612.18
  5. Step 5: Solve for x
    x = 12,333,909,612.18/126,971
  6. Step 6: Final answer
    x = 97,139.58

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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.