Home / 287,476,985.60-431,215,478.40-105,686,547.20

Finding the Fourth Proportional to 287,476,985.60, 431,215,478.40 and 105,686,547.20

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Solution

The fourth proportional to 287,476,985.60, 431,215,478.40 and 105,686,547.20 is: 158,529,820.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,476,985.60 : 431,215,478.40 = 105,686,547.20 : x
  2. Step 2: Convert to fraction form
    287,476,985.60/431,215,478.40 = 105,686,547.20/x
  3. Step 3: Cross multiply
    287,476,985.60x = 431,215,478.40 × 105,686,547.20
  4. Step 4: Simplify right side
    287,476,985.60x = 45,573,675,011,292,176
  5. Step 5: Solve for x
    x = 45,573,675,011,292,176/287,476,985.60
  6. Step 6: Final answer
    x = 158,529,820.80

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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.