Home / 138,442.39-191,050.50-74,780.19

Finding the Fourth Proportional to 138,442.39, 191,050.50 and 74,780.19

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Solution

The fourth proportional to 138,442.39, 191,050.50 and 74,780.19 is: 103,196.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,442.39 : 191,050.50 = 74,780.19 : x
  2. Step 2: Convert to fraction form
    138,442.39/191,050.50 = 74,780.19/x
  3. Step 3: Cross multiply
    138,442.39x = 191,050.50 × 74,780.19
  4. Step 4: Simplify right side
    138,442.39x = 14,286,792,970.02
  5. Step 5: Solve for x
    x = 14,286,792,970.02/138,442.39
  6. Step 6: Final answer
    x = 103,196.66

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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.