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Finding the Fourth Proportional to 118,889,712.90, 178,334,569.35 and 86,473,124.10

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Solution

The fourth proportional to 118,889,712.90, 178,334,569.35 and 86,473,124.10 is: 129,709,686.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,889,712.90 : 178,334,569.35 = 86,473,124.10 : x
  2. Step 2: Convert to fraction form
    118,889,712.90/178,334,569.35 = 86,473,124.10/x
  3. Step 3: Cross multiply
    118,889,712.90x = 178,334,569.35 × 86,473,124.10
  4. Step 4: Simplify right side
    118,889,712.90x = 15,421,147,346,722,604
  5. Step 5: Solve for x
    x = 15,421,147,346,722,604/118,889,712.90
  6. Step 6: Final answer
    x = 129,709,686.15

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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.