Home / 128,774,436.60-193,161,654.90-77,630,129.40

Finding the Fourth Proportional to 128,774,436.60, 193,161,654.90 and 77,630,129.40

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Solution

The fourth proportional to 128,774,436.60, 193,161,654.90 and 77,630,129.40 is: 116,445,194.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,774,436.60 : 193,161,654.90 = 77,630,129.40 : x
  2. Step 2: Convert to fraction form
    128,774,436.60/193,161,654.90 = 77,630,129.40/x
  3. Step 3: Cross multiply
    128,774,436.60x = 193,161,654.90 × 77,630,129.40
  4. Step 4: Simplify right side
    128,774,436.60x = 14,995,164,265,005,146
  5. Step 5: Solve for x
    x = 14,995,164,265,005,146/128,774,436.60
  6. Step 6: Final answer
    x = 116,445,194.10

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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.