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Finding the Fourth Proportional to 144,807,701.80, 217,211,552.70 and 128,935,330.60

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Solution

The fourth proportional to 144,807,701.80, 217,211,552.70 and 128,935,330.60 is: 193,402,995.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,807,701.80 : 217,211,552.70 = 128,935,330.60 : x
  2. Step 2: Convert to fraction form
    144,807,701.80/217,211,552.70 = 128,935,330.60/x
  3. Step 3: Cross multiply
    144,807,701.80x = 217,211,552.70 × 128,935,330.60
  4. Step 4: Simplify right side
    144,807,701.80x = 28,006,243,357,513,820
  5. Step 5: Solve for x
    x = 28,006,243,357,513,820/144,807,701.80
  6. Step 6: Final answer
    x = 193,402,995.90

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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.