Home / 121,881,123.55-168,163,414.50-72,280,258.80

Finding the Fourth Proportional to 121,881,123.55, 168,163,414.50 and 72,280,258.80

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Solution

The fourth proportional to 121,881,123.55, 168,163,414.50 and 72,280,258.80 is: 99,727,462.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,881,123.55 : 168,163,414.50 = 72,280,258.80 : x
  2. Step 2: Convert to fraction form
    121,881,123.55/168,163,414.50 = 72,280,258.80/x
  3. Step 3: Cross multiply
    121,881,123.55x = 168,163,414.50 × 72,280,258.80
  4. Step 4: Simplify right side
    121,881,123.55x = 12,154,895,120,751,672
  5. Step 5: Solve for x
    x = 12,154,895,120,751,672/121,881,123.55
  6. Step 6: Final answer
    x = 99,727,462.03

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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.