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Finding the Fourth Proportional to 42,009,853.80, 63,014,780.70 and 13,258,895.70

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Solution

The fourth proportional to 42,009,853.80, 63,014,780.70 and 13,258,895.70 is: 19,888,343.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,009,853.80 : 63,014,780.70 = 13,258,895.70 : x
  2. Step 2: Convert to fraction form
    42,009,853.80/63,014,780.70 = 13,258,895.70/x
  3. Step 3: Cross multiply
    42,009,853.80x = 63,014,780.70 × 13,258,895.70
  4. Step 4: Simplify right side
    42,009,853.80x = 835,506,404,859,673
  5. Step 5: Solve for x
    x = 835,506,404,859,673/42,009,853.80
  6. Step 6: Final answer
    x = 19,888,343.55

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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.