Home / 128,910,617.79-177,896,671.74-70,173,728.81

Finding the Fourth Proportional to 128,910,617.79, 177,896,671.74 and 70,173,728.81

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Solution

The fourth proportional to 128,910,617.79, 177,896,671.74 and 70,173,728.81 is: 96,839,756.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,910,617.79 : 177,896,671.74 = 70,173,728.81 : x
  2. Step 2: Convert to fraction form
    128,910,617.79/177,896,671.74 = 70,173,728.81/x
  3. Step 3: Cross multiply
    128,910,617.79x = 177,896,671.74 × 70,173,728.81
  4. Step 4: Simplify right side
    128,910,617.79x = 12,483,672,798,884,352
  5. Step 5: Solve for x
    x = 12,483,672,798,884,352/128,910,617.79
  6. Step 6: Final answer
    x = 96,839,756.20

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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.