Home / 128,776,012.20-193,164,018.30-42,527,730.60

Finding the Fourth Proportional to 128,776,012.20, 193,164,018.30 and 42,527,730.60

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Solution

The fourth proportional to 128,776,012.20, 193,164,018.30 and 42,527,730.60 is: 63,791,595.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,776,012.20 : 193,164,018.30 = 42,527,730.60 : x
  2. Step 2: Convert to fraction form
    128,776,012.20/193,164,018.30 = 42,527,730.60/x
  3. Step 3: Cross multiply
    128,776,012.20x = 193,164,018.30 × 42,527,730.60
  4. Step 4: Simplify right side
    128,776,012.20x = 8,214,827,331,875,871
  5. Step 5: Solve for x
    x = 8,214,827,331,875,871/128,776,012.20
  6. Step 6: Final answer
    x = 63,791,595.90

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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.