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Finding the Fourth Proportional to 126,971, 175,220.14 and 70,390.84

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Solution

The fourth proportional to 126,971, 175,220.14 and 70,390.84 is: 97,139.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,971 : 175,220.14 = 70,390.84 : x
  2. Step 2: Convert to fraction form
    126,971/175,220.14 = 70,390.84/x
  3. Step 3: Cross multiply
    126,971x = 175,220.14 × 70,390.84
  4. Step 4: Simplify right side
    126,971x = 12,333,892,839.52
  5. Step 5: Solve for x
    x = 12,333,892,839.52/126,971
  6. Step 6: Final answer
    x = 97,139.45

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1.5x scale

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.