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Finding the Fourth Proportional to 94,890, 130,948.20 and 57,172.08

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Solution

The fourth proportional to 94,890, 130,948.20 and 57,172.08 is: 78,897.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    94,890 : 130,948.20 = 57,172.08 : x
  2. Step 2: Convert to fraction form
    94,890/130,948.20 = 57,172.08/x
  3. Step 3: Cross multiply
    94,890x = 130,948.20 × 57,172.08
  4. Step 4: Simplify right side
    94,890x = 7,486,580,966.26
  5. Step 5: Solve for x
    x = 7,486,580,966.26/94,890
  6. Step 6: Final answer
    x = 78,897.47

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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.