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Finding the Fourth Proportional to 191,818,497.80, 287,727,746.70 and 70,634,203.40

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Solution

The fourth proportional to 191,818,497.80, 287,727,746.70 and 70,634,203.40 is: 105,951,305.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,818,497.80 : 287,727,746.70 = 70,634,203.40 : x
  2. Step 2: Convert to fraction form
    191,818,497.80/287,727,746.70 = 70,634,203.40/x
  3. Step 3: Cross multiply
    191,818,497.80x = 287,727,746.70 × 70,634,203.40
  4. Step 4: Simplify right side
    191,818,497.80x = 20,323,420,184,231,480
  5. Step 5: Solve for x
    x = 20,323,420,184,231,480/191,818,497.80
  6. Step 6: Final answer
    x = 105,951,305.10

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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.