Home / 138,669.12-191,363.52-75,006.72

Finding the Fourth Proportional to 138,669.12, 191,363.52 and 75,006.72

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Solution

The fourth proportional to 138,669.12, 191,363.52 and 75,006.72 is: 103,509.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,669.12 : 191,363.52 = 75,006.72 : x
  2. Step 2: Convert to fraction form
    138,669.12/191,363.52 = 75,006.72/x
  3. Step 3: Cross multiply
    138,669.12x = 191,363.52 × 75,006.72
  4. Step 4: Simplify right side
    138,669.12x = 14,353,549,962.85
  5. Step 5: Solve for x
    x = 14,353,549,962.85/138,669.12
  6. Step 6: Final answer
    x = 103,509.35

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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.