Home / 145,163,531.40-217,745,297.10-128,157,419.40

Finding the Fourth Proportional to 145,163,531.40, 217,745,297.10 and 128,157,419.40

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Solution

The fourth proportional to 145,163,531.40, 217,745,297.10 and 128,157,419.40 is: 192,236,129.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,163,531.40 : 217,745,297.10 = 128,157,419.40 : x
  2. Step 2: Convert to fraction form
    145,163,531.40/217,745,297.10 = 128,157,419.40/x
  3. Step 3: Cross multiply
    145,163,531.40x = 217,745,297.10 × 128,157,419.40
  4. Step 4: Simplify right side
    145,163,531.40x = 27,905,675,362,822,304
  5. Step 5: Solve for x
    x = 27,905,675,362,822,304/145,163,531.40
  6. Step 6: Final answer
    x = 192,236,129.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.