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Finding the Fourth Proportional to 473,363,999.80, 710,045,999.70 and 128,317,073.20

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Solution

The fourth proportional to 473,363,999.80, 710,045,999.70 and 128,317,073.20 is: 192,475,609.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    473,363,999.80 : 710,045,999.70 = 128,317,073.20 : x
  2. Step 2: Convert to fraction form
    473,363,999.80/710,045,999.70 = 128,317,073.20/x
  3. Step 3: Cross multiply
    473,363,999.80x = 710,045,999.70 × 128,317,073.20
  4. Step 4: Simplify right side
    473,363,999.80x = 91,111,024,518,872,080
  5. Step 5: Solve for x
    x = 91,111,024,518,872,080/473,363,999.80
  6. Step 6: Final answer
    x = 192,475,609.80

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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.