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Finding the Fourth Proportional to 98,123,999.70, 147,185,999.55 and 98,123,999.70

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Solution

The fourth proportional to 98,123,999.70, 147,185,999.55 and 98,123,999.70 is: 147,185,999.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,123,999.70 : 147,185,999.55 = 98,123,999.70 : x
  2. Step 2: Convert to fraction form
    98,123,999.70/147,185,999.55 = 98,123,999.70/x
  3. Step 3: Cross multiply
    98,123,999.70x = 147,185,999.55 × 98,123,999.70
  4. Step 4: Simplify right side
    98,123,999.70x = 14,442,478,975,688,402
  5. Step 5: Solve for x
    x = 14,442,478,975,688,402/98,123,999.70
  6. Step 6: Final answer
    x = 147,185,999.55

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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.