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Finding the Fourth Proportional to 100,038.95, 138,058.17 and 57,611.15

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Solution

The fourth proportional to 100,038.95, 138,058.17 and 57,611.15 is: 79,505.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,038.95 : 138,058.17 = 57,611.15 : x
  2. Step 2: Convert to fraction form
    100,038.95/138,058.17 = 57,611.15/x
  3. Step 3: Cross multiply
    100,038.95x = 138,058.17 × 57,611.15
  4. Step 4: Simplify right side
    100,038.95x = 7,953,689,876.04
  5. Step 5: Solve for x
    x = 7,953,689,876.04/100,038.95
  6. Step 6: Final answer
    x = 79,505.93

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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.