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Finding the Fourth Proportional to 421,736,670.84, 632,646,860.68 and 155,912,061.80

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Solution

The fourth proportional to 421,736,670.84, 632,646,860.68 and 155,912,061.80 is: 233,883,565.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,736,670.84 : 632,646,860.68 = 155,912,061.80 : x
  2. Step 2: Convert to fraction form
    421,736,670.84/632,646,860.68 = 155,912,061.80/x
  3. Step 3: Cross multiply
    421,736,670.84x = 632,646,860.68 × 155,912,061.80
  4. Step 4: Simplify right side
    421,736,670.84x = 98,637,276,439,916,144
  5. Step 5: Solve for x
    x = 98,637,276,439,916,144/421,736,670.84
  6. Step 6: Final answer
    x = 233,883,565.88

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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.