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Finding the Fourth Proportional to 42,706,664.40, 64,053,775.80 and 12,411,368.40

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Solution

The fourth proportional to 42,706,664.40, 64,053,775.80 and 12,411,368.40 is: 18,615,244.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,706,664.40 : 64,053,775.80 = 12,411,368.40 : x
  2. Step 2: Convert to fraction form
    42,706,664.40/64,053,775.80 = 12,411,368.40/x
  3. Step 3: Cross multiply
    42,706,664.40x = 64,053,775.80 × 12,411,368.40
  4. Step 4: Simplify right side
    42,706,664.40x = 794,995,008,864,804.75
  5. Step 5: Solve for x
    x = 794,995,008,864,804.75/42,706,664.40
  6. Step 6: Final answer
    x = 18,615,244.72

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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.