Home / 138,503.36-191,123.15-78,088.85

Finding the Fourth Proportional to 138,503.36, 191,123.15 and 78,088.85

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Solution

The fourth proportional to 138,503.36, 191,123.15 and 78,088.85 is: 107,756.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,503.36 : 191,123.15 = 78,088.85 : x
  2. Step 2: Convert to fraction form
    138,503.36/191,123.15 = 78,088.85/x
  3. Step 3: Cross multiply
    138,503.36x = 191,123.15 × 78,088.85
  4. Step 4: Simplify right side
    138,503.36x = 14,924,585,645.82
  5. Step 5: Solve for x
    x = 14,924,585,645.82/138,503.36
  6. Step 6: Final answer
    x = 107,756.13

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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.