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Finding the Fourth Proportional to 128,274.71, 177,017.90 and 70,915.52

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Solution

The fourth proportional to 128,274.71, 177,017.90 and 70,915.52 is: 97,862.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,274.71 : 177,017.90 = 70,915.52 : x
  2. Step 2: Convert to fraction form
    128,274.71/177,017.90 = 70,915.52/x
  3. Step 3: Cross multiply
    128,274.71x = 177,017.90 × 70,915.52
  4. Step 4: Simplify right side
    128,274.71x = 12,553,316,515.78
  5. Step 5: Solve for x
    x = 12,553,316,515.78/128,274.71
  6. Step 6: Final answer
    x = 97,862.76

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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.