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Finding the Fourth Proportional to 70,959.88, 97,929.08 and 39,128.76

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Solution

The fourth proportional to 70,959.88, 97,929.08 and 39,128.76 is: 54,000.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,959.88 : 97,929.08 = 39,128.76 : x
  2. Step 2: Convert to fraction form
    70,959.88/97,929.08 = 39,128.76/x
  3. Step 3: Cross multiply
    70,959.88x = 97,929.08 × 39,128.76
  4. Step 4: Simplify right side
    70,959.88x = 3,831,843,468.34
  5. Step 5: Solve for x
    x = 3,831,843,468.34/70,959.88
  6. Step 6: Final answer
    x = 54,000.14

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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.