Home / 138,628.80-191,306.88-74,966.40

Finding the Fourth Proportional to 138,628.80, 191,306.88 and 74,966.40

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Solution

The fourth proportional to 138,628.80, 191,306.88 and 74,966.40 is: 103,453.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,628.80 : 191,306.88 = 74,966.40 : x
  2. Step 2: Convert to fraction form
    138,628.80/191,306.88 = 74,966.40/x
  3. Step 3: Cross multiply
    138,628.80x = 191,306.88 × 74,966.40
  4. Step 4: Simplify right side
    138,628.80x = 14,341,588,088.83
  5. Step 5: Solve for x
    x = 14,341,588,088.83/138,628.80
  6. Step 6: Final answer
    x = 103,453.16

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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.