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Finding the Fourth Proportional to 153,687,894.48, 212,100,802.44 and 87,609,966.48

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Solution

The fourth proportional to 153,687,894.48, 212,100,802.44 and 87,609,966.48 is: 120,908,313.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,687,894.48 : 212,100,802.44 = 87,609,966.48 : x
  2. Step 2: Convert to fraction form
    153,687,894.48/212,100,802.44 = 87,609,966.48/x
  3. Step 3: Cross multiply
    153,687,894.48x = 212,100,802.44 × 87,609,966.48
  4. Step 4: Simplify right side
    153,687,894.48x = 18,582,144,192,149,504
  5. Step 5: Solve for x
    x = 18,582,144,192,149,504/153,687,894.48
  6. Step 6: Final answer
    x = 120,908,313.92

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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.