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Finding the Fourth Proportional to 138,866.10, 191,632.95 and 75,203.34

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Solution

The fourth proportional to 138,866.10, 191,632.95 and 75,203.34 is: 103,779.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,866.10 : 191,632.95 = 75,203.34 : x
  2. Step 2: Convert to fraction form
    138,866.10/191,632.95 = 75,203.34/x
  3. Step 3: Cross multiply
    138,866.10x = 191,632.95 × 75,203.34
  4. Step 4: Simplify right side
    138,866.10x = 14,411,437,894.05
  5. Step 5: Solve for x
    x = 14,411,437,894.05/138,866.10
  6. Step 6: Final answer
    x = 103,779.38

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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.