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Finding the Fourth Proportional to 138,859,031.60, 208,288,547.40 and 138,859,031.60

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Solution

The fourth proportional to 138,859,031.60, 208,288,547.40 and 138,859,031.60 is: 208,288,547.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,859,031.60 : 208,288,547.40 = 138,859,031.60 : x
  2. Step 2: Convert to fraction form
    138,859,031.60/208,288,547.40 = 138,859,031.60/x
  3. Step 3: Cross multiply
    138,859,031.60x = 208,288,547.40 × 138,859,031.60
  4. Step 4: Simplify right side
    138,859,031.60x = 28,922,745,985,334,696
  5. Step 5: Solve for x
    x = 28,922,745,985,334,696/138,859,031.60
  6. Step 6: Final answer
    x = 208,288,547.40

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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.